What is FEMA? Zoning Definition

FEMA — the Federal Emergency Management Agency — is a federal agency within the U.S. Department of Homeland Security. While FEMA is best known for disaster response, its role in zoning and land development is primarily through its flood hazard mapping program and the National Flood Insurance Program (NFIP). FEMA produces the Flood Insurance Rate Maps (FIRMs) that local governments use to regulate construction in flood-prone areas.

FEMA's flood maps divide communities into flood zones based on the likelihood and severity of flooding. Communities that want their residents to be eligible for federally backed flood insurance must adopt and enforce floodplain management ordinances that meet FEMA's minimum standards. These ordinances require new buildings in high-risk flood zones to be elevated above the Base Flood Elevation (BFE) and built with flood-resistant materials, among other requirements.

For property owners and developers, FEMA's flood maps directly affect construction costs, insurance requirements, and what can be built on a given site. If your property is in a FEMA-designated Special Flood Hazard Area (SFHA), you will face stricter building requirements and mandatory flood insurance if you have a federally backed mortgage. Even if you are outside a high-risk zone, FEMA still recommends considering flood insurance, as more than 20% of flood claims come from properties in moderate- and low-risk areas.

FEMA periodically updates its flood maps as new data becomes available, and these updates can change a property's flood zone designation. If your property is affected by a map update, you can participate in the public comment process or apply for a formal map change. Check the FEMA Flood Map Service Center at msc.fema.gov to look up your property's current flood zone.