# Introduction
All regions of the United States (U.S.) experience disasters. Many of these disasters increase morbidity and mortality. 1 Some disasters are large scale, such as hurricanes, forest fires, and earthquakes. Others are more localized, such as tornadoes or mudslides. Disasters can lead to "severe physical injuries, emotional distress, loss of life, and property damage to the point of destroying communities. " 2 Unfortunately, the number of disasters in the U.S. has been increasing, a trend that is expected to continue. At-risk groups, also referred to as socially vulnerable populations, require special attention in a disaster. During disasters, populations with higher levels of social vulnerability are more likely to be adversely affected.
In emergency preparedness, a major goal is to be able to reach every person in a community. To do this, you, as emergency managers, must be able to get information to community members quickly. To do that, you need to know which groups are at risk, where the people in these groups live and work, and the best ways they receive information.
Research by the National Center for Environmental Health (NCEH) at the Centers for Disease Control and Prevention (CDC) indicates that emergency managers would benefit from more information on how to identify at-risk groups within their communities. 3 In response, NCEH, other centers at CDC, and volunteers from the emergency management community created this guidance document on processes and tools that could help in these efforts. By knowing vulnerabilities in your community, you, as emergency managers, can better anticipate needs and provide information to the right people at the right time before, during, and after disasters. This document describes a process that will help you identify at-risk groups in your community. You can use this information to reduce vulnerabilities and enhance outcomes for a broader population of those at risk. Social vulnerability is defined in terms of the characteristics of a person or group that affect "their capacity to anticipate, cope with, resist, and recover from the impact" of a discrete and identifiable disaster in nature or society. 4 A person's vulnerability to disaster is influenced by many factors. The following six categories are among the most commonly accepted: socioeconomic status, age, gender, race and ethnicity, English language proficiency, and medical issues and disability. 1,5 These six categories described below can help you to identify the at-risk groups within your community that could be disproportionately affected by disasters.
Keep in mind that many people might fit more than one category.

# Socioeconomic status
Socioeconomic status (SES) is one of the key factors of social vulnerability. It includes employment, income, housing (e.g., homelessness), and education level. 6,7,8 People with lower socioeconomic status more likely lack resources needed to follow emergency preparedness instructions. They might be unable to stockpile food, for example. They might be unwilling or unable to stay home from work and lose a day's pay, or evacuate and leave their home during an emergency. By identifying at-risk groups ahead of time, you can plan more efficient evacuations and specifically target people who need transportation or special assistance (e.g., those without a vehicle).

# Age
The old and the young are particularly vulnerable during emergencies.
Older adults are more likely to have medical problems that put them at an increased risk during a disaster. They might have chronic health problems or limited mobility. They might have limited sight, hearing, or cognitive ability. Any of these health issues can limit their capacity to follow instructions. Older adults might also have reduced income, putting them at increased risk because of their limited resources. Some older adults are also isolated by their living situations or limited mass media use, making communication with this group difficult.
Young children are also more at risk. They have yet to develop the resources, knowledge, or understanding to effectively cope with disaster, and they are more susceptible to injury and disease. 1,9 Young children also are more vulnerable when they are separated from their parents or guardians, for example, at school or in daycare.

# Gender
Gender does not necessarily indicate vulnerability or disadvantage. However, gender intersects with social patterns and inequalities can arise from gender differences. 10 During a disaster, females might be more vulnerable because of differences in employment, lower income, and family responsibilities, as most single-parent households are single-mother families. 11,12 However, females are a strong influence in mobilizing response to a warning. Females are also more likely to be effective risk communicators through being active participants in the community. They also might know more "neighborhood information" that can assist emergency managers. 10 Although many families evacuate together, it is not uncommon for males to stay behind to guard the property or to continue working as the family provider. Males are also more likely to be risk takers and might not heed warnings. 10

# Race and ethnicity
Race and ethnicity contribute to social vulnerabilities. 1,6,7,11 Race and ethnicity are tied to issues of SES. Social and economic marginalization contributes to the vulnerability of these groups.

# English language proficiency
In the U.S., people with limited English proficiency (LEP) have a limited ability to read, speak, or write in English. 1 LEP groups might have trouble understanding public health directives if language barriers are not addressed when developing emergency preparedness messages. 1 Messages should also be culturally sensitive, paying attention to dialects and social norms, to ensure that LEP populations receive and respond to emergency directives. 1 These considerations should be taken into account for both populations who speak English as a second language, as well as native English speakers who have difficulty reading, interpreting, and calculating from written materials.

# Medical issues and disability
Persons with a disability include those with a cognitive, physical, or sensory impairment that limits a major life activity. People with physical impairments might include those with limited sight, hearing, or mobility or those who are dependent on electric power to operate medical equipment. For many people with medical conditions and disabilities, their ability to hear, understand, or respond to a warning is impaired. This category also includes individuals with access and functional needs, irrespective of diagnosis or status, and persons with medical conditions (e.g., cancer).
By identifying vulnerabilities within a community, you can design and implement community-based efforts during all four phases of disasters (preparedness, response, recovery, and mitigation). 13 Having a clear understanding of how and where at-risk groups might be most affected during a disaster will help you allocate resources efficiently before, during, and after an emergency. 2 You can use information on at-risk groups during each of the four phases of a disaster: preparedness, response, recovery, and mitigation.
Planning for an Emergency 3

# Phases of the disaster cycle
You can apply the individual and population approaches presented in this document to all four phases of a disaster. These include preparedness, response, recovery, and mitigation. Addressing these four phases in your emergency preparedness plan will help you identify the specific information you need to collect.

# Preparedness:
In this phase, you develop emergency preparedness plans to save lives and minimize damage that can occur during a disaster. 16 During the preparedness phase, you will need to know: 5
- Which groups are less likely to prepare for disasters?
- Which groups will lack essential emergency response items?
Response: During this phase, you take action to save lives and prevent additional damage during a disaster. 16 During the response phase, you will need to know: 17 - Which groups are least likely to hear, understand and respond to warnings?
- Which groups will have difficulty following emergency directives?
- Which groups will need emergency medical care or continuation of medical care, and which groups are least likely to have access to emergency services? Recovery: After a disaster occurs, you and others act to help restore the community back to normal. This can include repairing, replacing, or rebuilding property. 16 During the recovery phase, you will need to know: 17 - Which groups are most likely to have suffered the most from impact?
- Which groups are most likely to have experienced the most economic or emotional stress or altered social factors?
Mitigation: This phase involves developing policies to reduce risks to people and property during a disaster. 16 During the mitigation phase, you will need to know: 17 - Which groups are most at risk during an emergency?
- What resources are needed by at-risk groups during an emergency?
The Strategies for Identifying At-Risk Groups:

# Individual Approach
To identify at-risk groups, emergency managers can benefit from obtaining information on an individual level. Two methods of collecting individual information are registries and Community Outreach Information Networks (COINs). You can use these two methods, described below, to identify at-risk groups to improve communication methods and promote resiliency.

# Use of Registries
A registry is "a voluntary database of individuals who meet the eligibility requirements for receiving additional emergency response services based on specific needs. " 14 Using a registry, you will be able to identify people who require assistance before, during, or after an emergency. In addition, you will also know the specific form of help these individuals need.
The most common types of registries include the following:
Access and functional needs registries-These are broad scope registries that include any person who needs special assistance. This can include people with physical or mental disability, impaired mobility, or dependence on medication or medical equipment.
Medical needs registries-These are limited to people with specific medical needs. Individuals placed on medical needs registries can provide documentation from a doctor on their specific medical requirements.
Transportation registries-These registries will help identify people with impaired mobility or those who require assistance in evacuating a location during an emergency.

# Developing a Registry
When developing a registry, identify the best method to collect information from at-risk community members.
Recruiting people to participate in a registry might be difficult. Some groups might be distrustful of providing personal information to unknown people or organizations.
Partnering with various community organizations can help in identifying and recruiting people to register.
People often do not self-identify as being at risk. They might not know they should register or how to do so. You can address this by improving messaging and communication to increase awareness and encourage people to self-register.
Options for outreach range from brochures and flyers to television announcements, websites, and community meetings. Some methods for collecting information from at-risk groups to create a database include the following:
- Web form that people can use to submit and update their information.
- Central phone number that people can call to register.
- Direct mail registration forms that people can fill out and return.
- Social service workers or volunteers who collect information from clients when they apply for other public health services.
You will also need to consider certain legal liabilities when establishing a registry to provide assistance during an emergency. People who enroll in the registry might expect guaranteed assistance during a disaster. Therefore, it is important to inform registrants of the following:
- With whom the information will be shared.
- How information will be used.
- Security measures in place for protecting information.
- The type of help that might be available.
- Limitations on help (i.e., help is not guaranteed).
Transient populations, such as homeless people, can be difficult to reach before and during an emergency.
Even if some people are registered before an emergency, locating them during an emergency can be difficult.

# Challenges and Limitations to Registry Implementation
After you develop a registry, you might face challenges during implementation, such as:
- Eligible participants might not enroll because of concerns regarding the privacy and protection of their medical and personal information.
- Potential enrollees might not believe they have a need for assistance.
- Registries do not identify every person who might need assistance during an emergency.
- Registry participants might believe that participation takes the place of personal preparedness. 14

# Maintenance of registries
Registries must be updated regularly to account for changes to information among listed persons. People move. Their health and physical needs change. Additional changes to your community will occur as people move in and out of your jurisdiction. All these changes should be factored into your plans for keeping your registry up-to-date.

# Suggestions for Maintaining and Updating Registries
Suggestions include the following:
- Send annual reminders (e.g., with utility bills) to registrants to review their information.
- Maintain a database that people can update yearround by phone, online, or by mail.
- Require that participants re-register every year.
- Conduct calls regularly to ensure that registrants still need to be included in the registry.
Be sure to allocate the appropriate resources (e.g., funding and staff) needed to maintain your registry and ensure the information does not become outdated.

# Summary
A registry can be helpful in emergency preparedness and response for at-risk groups. It gives you a database identifying community members and their specific needs.
During a disaster you will know where these people live and the type of assistance they require. Mapping information within registries can provide a clear and specific picture of where at-risk groups live within your community. Having a visual representation of the areas with the most need will help you allocate resources appropriately before, during, and after a disaster. - potential uses of personal information,
- security provisions and precautions in place to ensure personal privacy,
- potential uses of personal information,
- security provisions and precautions in place to ensure personal privacy,
- limitations of liability,
- limitations in service that may occur under various disaster situations, and

# Community Outreach Information Network (COIN) Development
In response to the Pandemic and All-Hazards Preparedness Act i , CDC created a process for public health planners to define, locate, and reach at-risk groups in an emergency. 19 The process leads to the development of a Community Outreach Information Network (COIN). This is a grassroots network of people and trusted community leaders who can assist with emergency planning and the delivery of information to at-risk groups before, during, and after an emergency. A COIN composed of trusted community leaders will be helpful in identifying and reaching at-risk people.
There are three phases when developing a COIN, these are: The next phase provides strategies to locate the groups you have identified as at risk within your community.

# Identify organizations and key contacts
It is important to first identify any organizations or agencies already working in this area and what they have already done. You might, for example, check state, local, tribal, and territorial public health departments for information on the at-risk groups they serve. Locating at-risk groups will involve communicating and working with key organizations and contacts in your community to build a strong network of partners. Identify organizations that fund or partner with smaller, direct service providers to be part of your network. You might also include businesses and others who work with, represent, or belong to at-risk groups. In addition, you can ask COIN members about informal groups they belong to that reach at-risk groups. These contacts will be able to link you to organizations that serve at-risk groups in the community. As you identify potential organizations, also identify potential contacts within these organizations and the best way to reach them. After identifying key contacts to include in your network, your next step is to meet with these potential partners to discuss the importance of identifying at-risk groups during an emergency and the role they and their organization can play during an emergency.
Other organizations or groups you can consider reaching out to include the following:
- Faith-based organizations -These groups usually have missions or ministries that provide services to members of their local community.
- University students who have disabilities -These students often form organizations that provide support and advocacy. You can contact the student activities department of local colleges and universities to locate such groups.
- People who belong to various cultural and ethnic groups -These people might form close bonds with other people in the same groups. People who speak the same language or share a common country of origin or religion might gather in informal ways. Churches, mosques, or other houses of worship are often places where community needs, political opinions, and employment options are discussed. In some ethnic populations, community storefronts are gathering and information centers.
Isolation is an important factor to consider in locating some at-risk groups. People can be isolated from the community in many different ways. These include geographic isolation, temporary residency, undocumented immigrant status, and religious and cultural practices. Isolated individuals can be difficult to reach during an emergency, because they might not use traditional means of communication. Non-traditional partners, such as businesses and non-profit organizations, might serve as important contacts.

# Trusted sources
It is important to include trusted or non-traditional leaders, such as a local pastor or respected teacher, as members of your COIN network.
- Trusted sources are more likely to reach at-risk groups during an emergency. They are viewed as more credible and have established trust within the community.
- A COIN might also include members of the media, especially those who have closer connections to at-risk groups, such as local ethnic media outlets. These media outlets can be a very powerful voice and provide a close connection to the populations they serve.
- Another trusted source might be the director of a "culturespecific" community center or a community health worker. These contacts might already have a good network in place to reach community members through an e-mail listserv, telephone calling tree, mailing list, or simple word-of-mouth.
One barrier faced by emergency managers trying to communicate and work with at-risk groups is distrust of the government. Working with existing, trusted sources in your community can help overcome this mistrust. People are more likely to listen and react when the message comes from a trusted source they view as credible.
Existing services Identify at-risk groups that might already receive services through your agency. You can reach out to other departments within your agency to conduct an inventory of their existing activities for locating at-risk groups. Questions you can ask the different department representatives include the following:
- Who are the at-risk groups served by the department?
- Where are their gathering places?
- What is the department's process for locating these people?
- How do at-risk populations receive information from the department?
- Who are their trusted sources?

# Gathering places
Another step is to locate and identify places where at-risk groups gather. These can include soup kitchens for homeless people, day-worker sites for undocumented immigrants, the post office, and shopping locations. Consult with your network of contacts to identify additional locations where at-risk groups gather.

# Mapping
Mapping will give you a clear and specific picture of where at-risk groups live within your community. Having a visual guide to the areas with the most need will help you allocate resources appropriately before, during, and after a disaster. You can partner with organizations that have access to digital mapping resources to help you map the location of at-risk groups. Such organizations might include You might also map the locations of members within your network to visualize your reach within the community.

# Communication
It will be beneficial to engage with your COIN as you go through the process of creating, implementing, and disseminating emergency preparedness information.
- Establish ongoing communication strategies to engage your COIN members.
- Identify the best means of communication (face-to-face, phone, mail, e-mail, etc.) with members of your network.
- Provide brief updates on the progress of your work and seek feedback on emergency planning activities.
- Establish a protocol for maintaining confidentiality of your COIN members. Let them know how and when their contact information might be used. This will also help with maintaining trust within your network.

# Keeping track
Finally, as you establish partnerships with various organizations, key contacts and trusted sources, consider creating a database to keep track of members within your network. Record information about key contacts at organizations and government agencies. Include their names, telephone numbers, and e-mail and postal addresses.
Once established, your COIN will require regular updating. Through ongoing monitoring of community members and organizations you will be aware of changes to existing members and can identify new members who should be approached and engaged.

# Phase 3: Reach At-Risk Groups
In this phase, the goal is to identify the best communication method to share emergency messages with at-risk groups before and during a disaster. In an emergency, messages must inform, educate, and mobilize people to follow public health directives. Messages can be delivered through television, radio, newspaper, bill inserts, flyers, word-ofmouth, social and community networks, and other channels. As you develop your emergency preparedness plan you will benefit from identifying the most effective way to reach at-risk groups in your community.

# Survey agencies and organizations
Conduct a survey of agencies and organizations that regularly work with at-risk groups or provide direct services to at-risk groups. This survey can include people within and outside your agency. Information you collect through the survey will allow you to learn of successful and failed strategies for communicating with at-risk groups.
Incorporating these lessons will ensure that you develop an effective communication plan.

# Conduct community assessments
Conduct a survey or focus group with members of the different at-risk groups you want to reach. This will allow you to collect firsthand information from your target population. You can ask questions on topics such as: If you lack the resources to conduct these activities through your agency, consider seeking help from members of your COIN (e.g., public health department, nonprofit organizations). They might be able to conduct the assessment for you or help in recruiting participants for the surveys or focus groups, or moderate the discussion with at-risk groups. Be sure to also seek their suggestions on the most appropriate method (telephone interview, written survey, focus group) to collect information from at-risk groups.
Review the data from the surveys conducted with people who work with at-risk groups and the information you gather from members of the at-risk groups. Also, review the data collected during phases 1 and 2. Identify common characteristics, themes, and emerging patterns for a clearer idea of the best methods to reach at-risk groups.

# Community Assessments for Public Health Emergency Response (CASPER)
CASPER is a public health tool used to gather information from households within a community. This effective epidemiologic method can be designed to provide planners and responders, such as emergency managers, with household-based information quickly and at low cost. During a CASPER, you can ask closedended questions such as:
- What is your main source of information regarding disaster or emergency events?
- What would be a reason that might prevent you from evacuating if asked to do so?
- Does your household currently have a 7-day supply of medication for each person who takes prescription meds?
Uses for emergency managers: Ask your public health colleagues about their use of CASPERs in all stages of the disaster lifecycle. Public health departments commonly use CASPER during a response to determine immediate needs, such as the number of households in the assessment area that do not have access to potable water. They also use it during the preparedness phase to help with preparedness planning. They might use it to learn, for example, the number of households in the assessment area that have an emergency preparedness kit. You can work with public health departments to determine when to conduct a CASPER and what questions to include to prioritize response efforts and distribution of resources.
For more information, go to: / CASPER_Toolkit_Version_2_0_508_Compliant.pdf

# Focus groups
The purpose of a focus or stakeholder group is to reveal attitudes, perceptions, and behaviors of people participating in the discussion. This method can help you gain an in-depth understanding of at-risk groups in your community. During a focus group, you should ask specific and open-ended questions, such as the following:
- What sources do you usually use to get news and information?
- When there is a disaster, how do you get information?
- How do you prefer to have information communicated to you?
- In the past, what has kept you from receiving important information?
Uses for emergency managers: Focus groups are a common tool for obtaining feedback for existing public health interventions or information on designing new ones. You can work with public health departments to plan and conduct focus or stakeholder groups to collect information on attitudes, perceptions, and behaviors before, during, and after emergencies. Having a better understanding of the at-risk groups will increase your ability to reach and assist them.

# Communication strategies
Data collected through surveys and focus groups will help you understand the cultural and language barriers facing at-risk individuals in your community. Your communication plan must accommodate the needs of at-risk groups to provide concise instructions before, during, and after a disaster. Keep these communication tips in mind:
- Use short sentences and plain language to allow for easy translation of materials. Consider using a sixth grade reading level or lower.
- Provide written materials in bilingual or multi-lingual format.
- Include visual aids such as pictures and maps to reinforce key messages.
- Repeat key information.
- Include directions and phone numbers.
- Use large fonts.
- Identify preferred communication methods (face-to-face, phone, word-of-mouth), and develop messages accordingly.
- Identify preferred media through which messages are delivered. Is it the local newspaper, ethnic radio station, or the church pastor?
- Consider working with media and communications specialists.

# Gather information from your network community organizations on their communication experiences.
Identify trusted messengers Some individuals in at-risk groups are apprehensive of people not considered part of their community. They will respond differently to messages based on the messenger. For example, people are more likely to be responsive to messages delivered by their neighbors than to those delivered by someone from a different background or community.
- When developing an emergency communication plan to reach at-risk groups, identify appropriate and trusted messengers to deliver information.
- Some members of your COIN might be considered trusted sources in the community.
- You can also identify trusted sources by asking community representatives or members of your network who they would recommend to disseminate messages before and during an emergency.
- Additional people to consider as messengers include the following:
-Religious leaders.
-Barbers and hair stylists.
-Community and neighborhood leaders who are perceived as credible.
-Reporters, editors, announcers, and news directors in media outlets that serve your community. Remember to include the ethnic media outlets as sources to disseminate your messages.
-Many populations view certain individuals, such as the matriarch of a family or elders, as the most respected and trusted sources of information.
People who live in lower threat areas or who have not experienced a major disaster are less likely to respond to emergency preparedness information.
Trusted messengers can engage people to help them understand their risk.

# Summary
As you go through the different phases and steps to develop your COIN, you will create a comprehensive emergency plan that accounts for the distinct needs of at-risk groups before, during, and after an emergency. Your plan will clearly identify who you consider at risk in your community and the best strategies to communicate emergency directives to these groups. The SVI uses U.S. Census (/ index.html) and American Community Survey (ACS) (http:// www.census.gov/acs/www/) data to identify at-risk groups by ranking all U.S. census tracts by level of social vulnerability. Census tracts are subdivisions of counties for which the Census collects statistical data. 15 The SVI ranks, at national-level or state-level, each tract on 14 social factors. Figure 1 shows these factors, grouped into four main themes.

# Figure 1. Social Vulnerability Index themes and social factors
The variable for disability (percent of persons older than 5 years with a disability) was dropped for 2010 because it was not included in the ACS that year, but will be included in the 2015 update.

# Using the Social Vulnerability Index
You can access the SVI at /. The site has a variety of tools and resources that can help emergency managers locate at-risk groups. These tools and resources are listed as topics and can be easily accessed from the main homepage.

# Interactive Map
The SVI tool gives you an option to customize unique maps for your specific needs.   You can use key findings from the individual and population approach to enhance existing communication plans by including at-risk population groups and designating appropriate, trusted spokespersons. 16

# D E K A L B D E K A L B
- Information from the individual and population level can be combined to gain a broader picture of the needs of at-risk groups in the community.
- You can use the SVI to identify areas with the highest number of at-risk persons. At the population level, the Vulnerable and At-Risk Populations Resource Guide generates custom maps using the SVI to give the jurisdiction an overview of their at-risk groups. At the individual level, the tool provides population-and partner-specific tools, materials, and tips to identify and engage at-risk groups (e.g., lessons learned from other communities, MOUs, templates) in emergency preparedness activities.

# Conclusion
This guidance document provides emergency managers like you with information on how to identify socially vulnerable or at-risk groups within their communities. These groups are disproportionately affected by disasters. The information in this document can help you better prepare and respond to the needs of these groups before, during, and after a disaster. This document focuses on two approaches to accomplishing this task, the individual approach and population approach.
The individual approach provides you with detailed instructions on how to identify and recruit key organizations and contacts in your community to assist with emergency plans and communication strategies. These contacts and organizations should have experience working with at-risk groups and should be viewed as trusted sources within the community. Creating and maintaining registries is another individual approach that might be beneficial to emergency managers, depending on availability of resources.
This document highlights the use of CDC's Social Vulnerability Index as a population level approach to planning for at-risk groups before and during a disaster. This index provides a visual representation of vulnerabilities within specified communities.
We encourage you to discuss the strategies presented here with other professionals involved in your local emergency management efforts. Effective emergency preparations require an integration of individual and population level approaches to overcome barriers to locating and reaching at-risk persons before and during an emergency. We hope the information provided here inspires emergency managers to think critically about the identification and engagement of at-risk groups and how to best serve them over the course of a disaster.

# Prepared County Maps
You can also use the SVI to view prepared county maps. The maps display the social vulnerability for any county at the census tract level. After identifying your county of interest, use the dropdown menu to select the census tract year, state, and county, then click "View County Map. " The prepared county map is displayed as a PDF document showing the overall social vulnerability of a county and a breakdown by each of the four domains (see Figure 2). The areas with more vulnerable populations are indicated by the darker color and those less vulnerable are lighter in color.

# Data Tools and Download
Emergency managers like you might find it helpful to use SVI data in emergency planning. Nationwide and state-specific data are available. The nationwide database provides data on all U.S. census tracts ranked against one another. This is most useful for nationwide or multi-state mapping and analysis. For individual state mapping, select the state-specific database in which census tracts within a state are ranked against one another. Decide on the type of data (e.g., vulnerabilities, census tract, ZIP Code-level, hospitals, and schools) and year, then download the database. The SVI data are in geodatabase format (mdb). You can download files for use in Microsoft Access or a Geographic Information System (GIS) software program such as ArcGIS or QGIS.

# How recently information was collected and how
accurate it is compared to the current status of your jurisdiction should be considered when using population-level information. The information from the SVI should be used along with local knowledge of the area and information on environmental risks to obtain the most accurate picture of vulnerability.

# Summary
Information on the location and relative concentration of different types of social vulnerabilities in small geographic areas, such as census tracts can help emergency managers locate and plan for the specific needs of their communities. This type of information is especially helpful during the preparedness phase of disaster. If for example, you find that a particular area within your jurisdiction has a relatively high concentration of persons 5 years and older who speak English "less than well. " You might use local knowledge to determine languages other than English spoken in the area. You could then plan to translate your disaster communications into those languages.
CDC's SVI is easy to access and relatively easy to use. If you do need assistance, partners within your community (public health, planning and development organizations, universities) who use SVI might be willing to help you get started. They can help interpret the information that you produce through SVI, or enrich your maps with additional social and geographic information specific to your community. You may also contact CDC's SVI coordinator for assistance (svi_coordinator@cdc.gov).
Additional examples of SVI tool use include the following: 17 A.Estimate the amount of needed supplies like food, water, medicine, and bedding. E. Plan the best way to evacuate people, accounting for those who have functional and access needs. These might include people without vehicles, older adults, or people who do not understand English well.
F. Identify communities that will need continued support to recover after an emergency or natural disaster. ii

# Glossary iii
Access and functional needs population: A population that might require physical, program, or effective communication access. They might have additional needs before, during, or after an incident in functional areas, including but not limited to independence, communication, transportation, and health maintenance (this is a subset of socially vulnerable population). 18 American Community Survey (ACS): An ongoing, mandatory statistical survey that annually samples a small percentage of the overall U.S. population. The SVI uses ACS and 2010 Census data (/).
Assistive technology: Any item, piece of equipment, or product system, whether acquired commercially, modified, or customized, used to increase, maintain, or improve functional capabilities of persons with disabilities. Also known as an assistive device. 18 At-risk group: A group within the overall population having a higher degree of demographic or socioeconomic vulnerability, rendering them more likely to be adversely affected by disaster. Also known as socially vulnerable population.

# Community Assessment for Public Health Emergency Response (CASPER):
An epidemiologic tool designed to provide to decision-makers household-based information about an affected community's needs quickly and in a simple format.

# Census:
The enumeration of an entire population usually with details being recorded on residence, age, sex, and race and ethnicity. The United States conducts a census every 10 years. At the time of publication of this document, the most recent census was in 2010.
Census tract: A small, relatively permanent geographic entity within a county (or county equivalent) determined by local participants before to each census. Census tracts vary in population but average about 4,000 persons.

# Community Outreach Information Network (COIN):
A grassroots network of people and trusted community leaders who can help with emergency planning and the delivery of information to at-risk populations before, during, and after an emergency.
Emergency Manager: Professionals at all levels of government and the private sector who prepare for, mitigate, respond to, assist in recovery from, and provide products and services for all emergencies, disasters, and threats to the nation's security.

# Geographic Information System (GIS):
An information system designed to store, integrate, analyze, and display all types of spatial or non-spatial data.

# Metropolitan Planning Organization (MPO):
An organization comprised of a Policy Board and Advisory Committees that help in planning for various modes of transportation, including highways, public transit, bicycles and pedestrians, and freight. Federal transportation legislation requires that an MPO be designated for each urbanized area with a population of more than 50,000 people to carry out the metropolitan transportation planning process, as a condition for federal aid.
Registry: A voluntary database containing personally identifying and medical information about persons who might require assistance in the event of a disaster. 18

# Social vulnerability:
A characteristic or characteristics of a person or group relating to their capacity to anticipate, cope with, resist, and recover from the impact of a discrete and identifiable disaster in nature or society.

# Socially vulnerable population:
A group within the overall population having a higher degree of demographic or socioeconomic vulnerability, rendering them more likely to be adversely affected by disaster. Also known as at-risk group.
iii Many of the terms in this glossary are adapted from the Draft International Association of Emergency Managers (IAEM)-National Emergency Management Association (NEMA) Joint Task Force 2014 Quick Reference Glossary of Terminology for Emergency Management Whole Community Planning Efforts, developed by an IAEM-NEMA joint task force.

# Centers for Disease Control and Prevention Division of Environmental Hazards and Health Effects
National Center for Environmental Health Health Studies Branch