Republic of the Philippines 
HOUSE OF REPRESENTATIVES 
Quezon City 
TWENTIETH CONGRESS 
First Regular Session 
HOUSE BILL NO. ____ 
Introduced by HON. BRIAN RAYMUND S. YAMSUAN 
AN ACT 
REQUIRING THE CREATION AND CONSISTENT UPDATING OF MULTI-
HAZARD MAPS FOR ALL CITIES AND MUNICIPALITIES IN THE COUNTRY 
EXPLANATORY NOTE 
Article II, Section 5 of the 1987 Constitution declares that “The maintenance of peace 
and order, the protection of life, liberty, and property, and the promotion of the general 
welfare are essential for the enjoyment by all the people of the blessings of 
democracy.” Article XIV, Section 10 further mandates that the “State shall give priority 
to research and development, invention, innovation, and their utilization.” 
Every year, the country is devastated by a number of storms and floods. According to 
the Philippine Atmospheric, Geophysical and Astronomical Services Administration 
(PAGASA), the Philippines is visited by an average of 20 typhoons every year.1 These 
storms disrupt livelihoods, damage property and crops, and endanger Filipino lives. 
For instance, in 2024, the combined effects of Tropical Storm Trami (Kristine) and 
Typhoon Kong-rey (Leon) resulted in damages exceeding ₱14 billion in agriculture 
and infrastructure.2 In 2025, due to the Southwest Monsoon and tropical cyclones 
Crising, Dante, and Emong, there was an estimated cost of damage to infrastructure 
amounting to Php 3,987,521,473.15.3 Beyond typhoons, the country faces various 
risks such as rising sea levels, and exposure to volcanic eruptions and earthquakes 
due to our location along the Pacific Ring of Fire. 
While natural phenomena cannot be prevented, it is possible to mitigate their impacts 
1 https://www.adrc.asia/nationinformation.php?NationCode=608&Lang=en 
2 https://apnews.com/article/philippines-typhoon-yinxing-876e9d337a65d3c5c2069ab41d36be28 
3https://ndrrmc.gov.ph/attachments/article/4293/Situational_Report_No_16_for_the_Combined_Effect
s_of_Southwest_Monsoon_and_TCs_CRISING_DANTE_and_EMONG_2025.pdf 
August 26, 2025
5:09 pm
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by understanding their behavior and adopting science-based and data-driven 
strategies. One such approach is hazard mapping. This is used to identify, among 
others, areas that are vulnerable to disasters due to the adverse effects of climate 
change. These hazard maps can be a helpful tool for land-use planning, 
implementation of flood-prevention measures, and creation of emergency response 
plans.4  
In 2012, the Department of Science and Technology launched the Project NOAH or 
Nationwide Operational Assessment of Hazards, the government’s flagship program 
for disaster prevention and mitigation which provided tools and information to mitigate 
or avert disasters caused by natural hazards.5 Project NOAH identified areas that 
would be hit by hazards brought about by extreme weather events. In 2017, however, 
Project NOAH was shut down due to the lack of funds. Despite the University of the 
Philippines deciding to adopt Project NOAH and continue its operations, it has 
difficulty in terms of budgetary constraints and national reach.6 
As a country highly vulnerable to natural disasters, with an estimated 60% of its land 
area and 74% of its population exposed to numerous hazards,7 we aim to build on 
what Project NOAH has achieved so far. This measure thus aims to ensure that each 
city and municipality has a multi-hazard map and that it is consistently updated. It 
seeks to integrate these maps into local development planning and disaster response. 
In view of the foregoing, the approval of this measure is earnestly sought. 
 BRIAN RAYMUND S. YAMSUAN 
       Representative 
    2nd District of Parañaque 
4 https://www.ctc-n.org/technologies/flood-hazard-mapping 
5https://www.dost.gov.ph/index.php/knowledge-resources/news/44-2015-news/876-dost-s-project-
noah-launches-new-disaster-mgmnt-platform. 
6 https://opinion.inquirer.net/184666/devastating-floods-is-the-philippines-ready. 
7 https://climateknowledgeportal.worldbank.org/country/philippines/vulnerability 


Republic of the Philippines 
HOUSE OF REPRESENTATIVES 
Quezon City 
TWENTIETH CONGRESS 
First Regular Session 
HOUSE BILL NO. ____ 
Introduced by HON. BRIAN RAYMUND S. YAMSUAN 
AN ACT 
REQUIRING THE CREATION AND CONSISTENT UPDATING OF MULTI-
HAZARD MAPS FOR ALL CITIES AND MUNICIPALITIES IN THE COUNTRY 
Be it enacted by the Senate and House of Representatives of the Philippines in 
Congress assembled: 
SECTION 1. Short Title. — This Act shall be known as the “National Multi-Hazard 
Mapping Act.” 
SECTION. 2. Declaration of Policy. — The State recognizes its duty to protect the 
life, liberty, and property of all its citizens. The State also affirms the essential role of 
science, and research and development in disaster risk reduction and management. 
Towards this end, the State shall ensure that every city and municipality maintains 
accurate, current, and publicly accessible multi-hazard maps, which are effectively 
integrated into local development planning and disaster response plans. 
SECTION 3. Creation of Multi-Hazard Maps. – Within one (1) year after the 
effectivity of this Act, the Department of Environment and Natural Resources (DENR), 
through the National Mapping and Resources Information Authority (NAMRIA), 
together with the Department of Science and Technology (DOST), Philippine Space 
Agency (PhilSA), Climate Change Commission (CCC), National Disaster Risk 
Reduction and Management Council (NDRRMC), the concerned local government 
units (LGU), and other relevant government agencies with existing hazard mapping 
projects and satellite imaging capabilities, shall undertake multi-hazard mapping for 
each city and municipality in the country. 
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The term “multi-hazard map” as used in this Act shall refer to a map that identifies the 
vulnerabilities of each LGU to threats, such as but not limited to landslides, flooding, 
sea level rise, storm surges, volcanic eruption, and earthquakes.  
 
The multi-hazard maps shall be updated by the DENR, in coordination with the 
concerned LGU, every three (3) years.  
 
SECTION 4. Public Access to Data Maps. – The DENR shall maintain a national 
registry of multi-hazard maps.  
 
To ensure the effective use of the multi-hazard maps, the DENR, in coordination with 
NAMRIA, DOST, PhilSA, CCC, NDRRMC, and other relevant agencies, shall develop 
and implement a comprehensive plan to ensure their accessibility and proper use 
across the country. This plan shall include, but not be limited to a nationwide 
information drive, training programs for local officials, disaster response teams, and 
community leaders, and other similar efforts. 
 
SECTION 5. Integration of Multi-Hazard Maps in Local Development Planning. – 
The multi-hazard maps shall be integrated into the local development and disaster 
response planning of each LGU. National agencies shall consider the maps in the 
planning, design, and approval of public works and utilities. 
  
SECTION 6. Appropriations. — The amount necessary to carry out the provisions of 
this Act shall be included in the budget of the concerned government agencies in the 
General Appropriations Act (GAA). 
 
Government agencies and LGUs may also utilize a portion of their respective GAD 
budget to implement this Act anchored on the guidelines issued by the Department of 
Budget and Management. 
 
SECTION 7. Repealing Clause. — All laws, decrees, executive orders, rules and 
regulations inconsistent with any provision of this Act are hereby repealed, modified, 
superseded, or amended accordingly. 
 
SECTION 8. Separability Clause. — If any provision of this Act or the application of 
such provision to any person or circumstance is held invalid for any reason, the 
remainder of this Act or the application of such provision to other persons or 
circumstances shall not be affected thereby. 
 
SECTION 9. Effectivity. — This Act shall take effect fifteen (15) days after its 
publication in the Official Gazette or in at least two (2) national newspapers of general 
circulation, whichever comes earlier. 
 
Approved,