National Flood Hazard Layer (NFHL)

FEMA continues to make enhancements that expand access to flood data through dynamic maps using the National Flood Hazard Layer (NFHL) available at https://www.fema.gov/national-flood-hazard-layer-nfhl address. These improvements simplify access and make flood hazard information easier to use.

The National Flood Hazard Layer (NFHL) is a geospatial database that contains current effective flood hazard data. The NFHL is made from effective flood maps and Letters of Map Change (LOMCs) delivered to communities. NFHL digital data coverage is not nationwide but it covers over 90 percent of the U.S. population. New and revised data is continuously added. If you want to explore the current digital effective flood hazard data in a map, the best tool to use is the NFHL Viewer. From the NFHL Viewer, you may view, download, and print flood maps at the scale of your choice for a specific location.

The NFHL viewer link is in the second paragraph of the National Flood Hazard Layer (NFHL) webpage available at https://www.fema.gov/national-flood-hazard-layer-nfh address. A list of the types of data available in the NFHL and information about other ways to access the NFHL may be found in the NFHL GIS Services User Guide available at https://www.fema.gov/media-library-data/1510944498802-158ae747182fa5f8b5418ea72fe5f219/NFHL_GIS_Services_Flyer.pdf address.

FEMA Logo. National Flood Hazard Layer (NFHL). The National Flood Hazard Layer (NFHL) is a geospatial database that contains current effective flood hazard data. FEMA provides the flood hazard data to support the National Flood Insurance Program. You can use the information to better understand your level of flood risk and type of flooding. The simplest way for you to access the flood hazard data, including the NFHL, is through FEMAs Map Service Center (MSC). If you want to explore the current digital effective flood hazard data in a map, the best tool to use is the NFHL Viewer. From the NFHL Viewer, you may view, download, and print flood maps for your location. Part of the Left Navigation Bar is visible, including Navigation, Search, and Languages option and Flood Hazard Mapping, View and Obtain Flood Maps, Change my Flood Zone Designation, Risk MAP, Flood Mapping Products and National Flood Hazard
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Note
A LOMC is a letter which reflects an official change to an effective Flood Insurance Rate Map (FIRM). LOMCs are issued in response to a request for FEMA to amend or revise its effective flood map to remove a property or reflect changed flooding conditions on the effective map.