Flood, fire, pollution and noise maps for any US address

Hazmaps is a free website that puts a plethora of publicly available US hazard data all in one place. Toggle layers, search an address, and click anywhere on the map to see the data for that spot.

What the map shows

Flood — nationwide
Nine layers from FEMA’s National Flood Hazard Layer, drawn in FEMA’s own cartography: flood hazard zones (AE / A / VE / X), base flood elevations, FIRM panels, cross-sections, levees, Letters of Map Revision, NFHL availability, water areas and political jurisdictions.
Past flooding — nationwide
High-water marks from the US Geological Survey’s flood event database: the points where survey crews measured how high the water reached after hurricanes, river floods and coastal storms, from 1888 to this year. About 39,500 marks across the lower 48, Alaska and Hawaii, including Katrina, Sandy, Harvey, Ian and Helene. Marks are colored by the kind of flood, and each kind can be switched on or off. Click a mark for the storm, the water height above the ground where it was surveyed or the water-surface elevation otherwise, and the surveyor’s accuracy grade. About a third of the marks have not yet been reviewed by USGS and are labeled so. Marks show where water was measured, not everywhere it flooded: no mark nearby does not mean a place stayed dry.
Transportation noise — nationwide
The US DOT Bureau of Transportation Statistics National Transportation Noise Map (2022): modelled 24-hour average sound level on a 30-metre grid across the lower 48, Alaska and Hawaii. Switch between aviation, road, rail, aviation + road, or all modes combined, and click to read the decibel band at a point.
Wildfire risk — nationwide
The USDA Forest Service Wildfire Risk to Communities “Risk to Homes” map (2nd edition, 2024): for every 30 m square of the lower 48, Alaska and Hawaii, the estimated wildfire risk to a house if one stood there, shown in five classes ranked against the rest of the country. Click to read the class at a point. It is a national model for comparing areas, not a property-level assessment, and it reflects vegetation as of 2020–2022, so it does not account for fires since then.
Past wildfires — nationwide
Mapped outlines of past wildfires from the National Interagency Fire Center: the Interagency Fire Perimeter History, which gathers the records of federal agencies, Alaska and CAL FIRE through the 2024 season, plus the WFIGS interagency perimeters for fires since. Prescribed burns are left out where the sources flag them. Fires are colored by how recently they burned, and each date range can be switched on or off. Click to list every fire recorded at a point, then pick one to outline it on the map. The outlines are approximate and meant for general awareness, not as a record of whether a specific property burned: not all ground inside one burned, and small or unmapped fires may be missing.
Fire hazard zones — California
CAL FIRE / Office of the State Fire Marshal Fire Hazard Severity Zones (Moderate, High, Very High), shown statewide as one layer built from the two maps CAL FIRE publishes separately by jurisdiction — State Responsibility Area, effective 1 April 2024, and Local Responsibility Area, adopted 24 March 2025.
Pollution burden — California
OEHHA’s CalEnviroScreen 4.0, by census tract, with a per-tract card showing the individual pollution and population indicators behind the score.

How to use it

Type an address or place name in the search box, or let the map open near you. Open the layer panel to find layers: search them by name, or browse them by hazard type or by location. Layers you have turned on are listed under “On the map” with their legends. Click the map to identify every visible feature under the cursor, with its attributes. Sharing the URL shares the map view and hazard data for that spot.

Where the data comes from

Every layer is derived from publicly available sources: FEMA, the US DOT Bureau of Transportation Statistics, the USDA Forest Service, CAL FIRE and the Office of the State Fire Marshal, and OEHHA. The basemap is OpenStreetMap data rendered through Protomaps. Hazmaps redraws these sources for legibility and puts them in one place; it does not model, score or adjust them, and it adds no risk predictions of its own.

What this is not

Hazmaps is not an official hazard determination, and nothing here should be relied on for a property transaction, an insurance decision or a permit. Agency maps are revised occasionally, and the snapshots on Hazmaps can be out of date. For current official data, go to the source: