DOI: 10.5281/zenodo.6459075
title: First Street Foundation Property Level Flood Risk Statistics V2.0

description: The property level flood risk statistics generated by the First Street Foundation Flood Model Version 2.0 come in CSV format. 


The data that is included in the CSV includes:



	

	
An FSID; a First Street ID (FSID) is a unique identifier assigned to each location.
	
	

	
The latitude and longitude of a parcel as well as the zip code, census block group, census tract, county, congressional district, and state of a given parcel.
	
	

	
The property’s Flood Factor as well as data on economic loss.
	
	

	
The flood depth in centimeters at the low, medium, and high CMIP 4.5 climate scenarios for the 2, 5, 20, 100, and 500 year storms this year and in 30 years.
	
	

	
Data on the cumulative probability of a flood event exceeding the 0cm, 15cm, and 30cm threshold depth is provided at the low, medium, and high climate scenarios for this year and in 30 years.
	
	

	
Information on historical events and flood adaptation, such as ID and name.
	



 


This dataset includes First Street's aggregated flood risk summary statistics. The data is available in CSV format and is aggregated at the congressional district, county, and zip code level. The data allows you to compare FSF data with FEMA data. You can also view aggregated flood risk statistics for various modeled return periods (5-, 100-, and 500-year) and see how risk changes due to climate change (compare FSF 2020 and 2050 data). There are various Flood Factor risk score aggregations available including the average risk score for all properties (flood factor risk scores 1-10) and the average risk score for properties with risk (i.e. flood factor risk scores of 2 or greater). This is version 2.0 of the data and it covers the 50 United States and Puerto Rico. There will be updated versions to follow.


If you are interested in acquiring First Street flood data, you can request to access the data here. More information on First Street's flood risk statistics can be found here and information on First Street's hazards can be found here.


The data dictionary for the parcel-level data is below.



	
		
			
			
Field Name
			
			
			
Type
			
			
			
Description
			
		
		
			
			
fsid
			
			
			
int
			
			
			
First Street ID (FSID) is a unique identifier assigned to each location
			
		
		
			
			
long
			
			
			
float
			
			
			
Longitude
			
		
		
			
			
lat
			
			
			
float
			
			
			
Latitude
			
		
		
			
			
zcta
			
			
			
int
			
			
			
ZIP code tabulation area as provided by the US Census Bureau
			
		
		
			
			
blkgrp_fips
			
			
			
int
			
			
			
US Census Block Group FIPS Code
			
		
		
			
			
tract_fips
			
			
			
int
			
			
			
US Census Tract FIPS Code
			
		
		
			
			
county_fips
			
			
			
int
			
			
			
County FIPS Code
			
		
		
			
			
cd_fips
			
			
			
int
			
			
			
Congressional District FIPS Code for the 116th Congress
			
		
		
			
			
state_fips
			
			
			
int
			
			
			
State FIPS Code
			
		
		
			
			
floodfactor
			
			
			
int
			
			
			
The property's Flood Factor, a numeric integer from 1-10 (where 1 = minimal and 10 = extreme) based on flooding risk to the building footprint. Flood risk is defined as a combination of cumulative risk over 30 years and flood depth. Flood depth is calculated at the lowest elevation of the building footprint (largest if more than 1 exists, or property centroid where footprint does not exist)
			
		
		
			
			
CS_depth_RP_YY
			
			
			
int
			
			
			
Climate Scenario (low, medium or high) by Flood depth (in cm) for the Return Period (2, 5, 20, 100 or 500) and Year (today or 30 years in the future). Today as year00 and 30 years as year30. ex: low_depth_002_year00
			
		
		
			
			
CS_chance_flood_YY
			
			
			
float
			
			
			
Climate Scenario (low, medium or high) by Cumulative probability (percent) of at least one flooding event that exceeds the threshold at a threshold flooding depth in cm (0, 15, 30) for the year (today or 30 years in the future). Today as year00 and 30 years as year30. ex: low_chance_00_year00
			
		
		
			
			
aal_YY_CS
			
			
			
int
			
			
			
The annualized economic damage estimate to the building structure from flooding by Year (today or 30 years in the future) by Climate Scenario (low, medium, high). Today as year00 and 30 years as year30. ex: aal_year00_low
			
		
		
			
			
hist1_id
			
			
			
int
			
			
			
A unique First Street identifier assigned to a historic storm event modeled by First Street
			
		
		
			
			
hist1_event
			
			
			
string
			
			
			
Short name of the modeled historic event
			
		
		
			
			
hist1_year
			
			
			
int
			
			
			
Year the modeled historic event occurred
			
		
		
			
			
hist1_depth
			
			
			
int
			
			
			
Depth (in cm) of flooding to the building from this historic event
			
		
		
			
			
hist2_id
			
			
			
int
			
			
			
A unique First Street identifier assigned to a historic storm event modeled by First Street
			
		
		
			
			
hist2_event
			
			
			
string
			
			
			
Short name of the modeled historic event
			
		
		
			
			
hist2_year
			
			
			
int
			
			
			
Year the modeled historic event occurred
			
		
		
			
			
hist2_depth
			
			
			
int
			
			
			
Depth (in cm) of flooding to the building from this historic event
			
		
		
			
			
adapt_id
			
			
			
int
			
			
			
A unique First Street identifier assigned to each adaptation project
			
		
		
			
			
adapt_name
			
			
			
string
			
			
			
Name of adaptation project
			
		
		
			
			
adapt_rp
			
			
			
int
			
			
			
Return period of flood event structure provides protection for when applicable
			
		
		
			
			
adapt_type
			
			
			
string
			
			
			
Specific flood adaptation structure type (can be one of many structures associated with a project)
			
		
		
			
			
fema_zone
			
			
			
string
			
			
			
Specific FEMA zone categorization of the property ex: A, AE, V. Zones beginning with "A" or "V" are inside the Special Flood Hazard Area which indicates high risk and flood insurance is required for structures with mortgages from federally regulated or insured lenders
			
		
		
			
			
footprint_flag
			
			
			
int
			
			
			
Statistics for the property are calculated at the centroid of the building footprint (1) or at the centroid of the parcel (0)