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Flood Maps

FEMA provides flood hazard and risk data to help guide mitigation actions.
Illustration of a map in a flood
alert - warning

This page has not been translated into Italiano. Visit the Italiano page for resources in that language.

Flood mapping is an important part of the National Flood Insurance Program (NFIP), as it is the basis of the NFIP regulations and flood insurance requirements. FEMA's flood mapping program is called Risk Mapping, Assessment, and Planning, or Risk MAP.

FEMA maintains and updates data through flood maps and risk assessments.

How to View and Obtain Flood Maps

The FEMA Flood Map Service Center (MSC) is the official online location to find all flood hazard mapping products created under the NFIP, including your community’s flood map.

Change Your Flood Zone Designation

If you believe your property was incorrectly identified as a Special Flood Hazard Area, you may submit an application to FEMA for a formal determination and potential revision. This is called a Letter of Map Change (LOMC) request.

Products and Tools

Regulatory Flood Map Products

Learn about regulatory flood map products and access flood maps, Flood Insurance Studies, and FIRM databases.

GIS and Other Products

Manage data with Preliminary Flood Hazard Data, National Flood Hazard Layer, and Hazus.

Risk Mapping, Assessment and Planning (Risk MAP)

These products provide a more user friendly analysis of flood risks within a Risk MAP project.

Tools to Help Use Products

Guidance and Partners

Guidelines & Standards

View Risk MAP guidelines and standards for flood risk analysis and mapping activities

Notices to Congress

FEMA provides a monthly summary to Congress providing details on flood risk mapping activities.

Advisory Council

Read about the Technical Mapping Advisory Council, a federal advisory committee.

Cooperating Technical Partners

Cooperating Technical Partners are communities, regional agencies, state agencies, universities and tribal nations that become more active participants in the FEMA flood hazard mapping program.

Manage Risk

Levee Flood Risk

To help understand the realities of levee risk, FEMA provides community outreach tools and construction guidelines related to levee risk.

Coastal Flood Risk

To help coastal communities understand and reduce their flood risk, FEMA has initiated coastal flood risk studies for 100 percent of the populated coastline.

Know Your Risk

Tips for homeowners, community officials, engineers, insurance professionals and other stakeholder groups about understanding risk.

Contact Us

For additional information or assistance, contact a Map Specialist in the FEMA Mapping and Insurance eXchange (FMIX).

Sign up for emails to receive flood hazard mapping updates.