Republic of the Philippines 
HOUSE OF REPRESENTATIVES 
Quezon City 
20th CONGRESS 
First Regular Session 
HOUSE BILL NO. 3158
Introduced by REP.JUAN CARLOS "ARJO" C. ATAYDE 
AN ACT 
PROVIDING FOR THE ISSUANCE OF A LIST OF LOW-LYING AREAS OF THE 
PHILIPPINE TERRITORY VULNERABLE TO RISING SEA LEVELS AS A RESULT 
OF CLIMATE CHANGE, AND AREAS AT HIGH RISK FOR NATURAL 
DISASTERS, MANDATING THE DEPARTMENT OF ENVIRONMENT AND 
NATURAL RESOURCES, DEPARTMENT OF SCIENCE AND TECHNOLOGY, 
CLIMATE CHANGE COMMISSION AND OTHER CONCERNED GOVERNMENT 
AGENCIES FOR ITS REGULAR UPDATING AND APPROPRIATING FUNDS 
THEREFOR AND FOR OTHER PURPOSES 
EXPLANATORY NOTE 
In other jurisdictions, hazard maps are in place and considered as valuable tools 
by planners, developers, and engineers. Religiously referring to the same has saved lives 
and economic losses because exposure to the potential negative effects of natural hazards 
such as earthquakes, flooding, landslides, liquefaction, etc. has been avoided. 
It was after the onslaught of severe tropical storm "Paeng" in October 2022 that 
revealed the unthought of and careless relocation of the indigenous Teduray community 
to the foot of Mount Minandar in Northern Maguindanao as it was later found to be 
prone to landslides. The relocated Teduray community succumbed to a landslide when 
they were swept by the rushing floods emanating from Mount Minandar. As a result, the 
catastrophe killed twenty-four (24) members of the Teduray tribe and injured more than 
thirty (30) others. 
August 5, 2025
5:21 pm




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Republic of the Philippines 
HOUSE OF REPRESENTATIVES 
Quezon City 
20th CONGRESS 
First Regular Session 
HOUSE BILL NO. 3158 
Introduced by REP. JUAN CARLOS "ARJO" C. ATAYDE 
AN ACT 
PROVIDING FOR THE ISSUANCE OF A LIST OF LOW-LYING AREAS OF THE 
PHILIPPINE TERRITORY VULNERABLE TO RISING SEA LEVELS AS A RESULT 
OF CLIMATE CHANGE, AND AREAS AT HIGH RISK FOR NATURAL 
DISASTERS, MANDATING THE DEPARTMENT OF ENVIRONMENT AND 
NATURAL RESOURCES, DEPARTMENT OF SCIENCE AND TECHNOLOGY, 
CLIMATE CHANGE COMMISSION AND OTHER CONCERNED GOVERNMENT 
AGENCIES FOR ITS REGULAR UPDATING AND APPROPRIATING FUNDS 
THEREFOR AND FOR OTHER PURPOSES 
Be it enacted by the Senate and House of Representatives of the Philippines in Congress 
assembled: 
SECTION 1. Title. - This Act shall be known as "National Hazard Mapping Act"
SEC. 2. Declaration of Policy. - It is the policy of the State to promote the public 
health, safety and general welfare. Towards this end, the State shall endeavor to 
formulate an orderly layout of the national land mass with identification of low-lying 
areas vulnerable to rising sea levels as a result of climate change, and areas at high risk 
for natural disasters. The State shall otherwise establish an organized and efficient system 
of evacuation from these areas in the event of imminent danger.
SEC. 3. National Disaster Map. -Within one (1) year after the effectivity of this
Act, the Department of Environment and Natural Resources (DENR), through the
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National Mapping and Resources Information Authority (NAMRIA), together with the
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Department of Science and Technology (DOST), Climate Change Commission and