More FEMA Flood Hazard Determinations Go Final
Published Date: 8/21/2026
Notice
Summary
Flood hazard determinations, which may include additions or modifications of Base Flood Elevations (BFEs), base flood depths, Special Flood Hazard Area (SFHA) boundaries or zone designations, or regulatory floodways on the Flood Insurance Rate Maps (FIRMs) and where applicable, in the supporting Flood Insurance Study (FIS) reports have been made final for the communities listed in the table below. The FIRM and FIS report are the basis of the floodplain management measures that a community is required either to adopt or to show evidence of having an effect in order to qualify or remain qualified for participation in the Federal Emergency Management Agency's (FEMA's) National Flood Insurance Program (NFIP).
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
Communities must adopt NFIP flood measures
FEMA states the FIRMs and FIS reports are the basis for floodplain management measures that a community is required to adopt or to show evidence of having an effect in order to qualify or remain qualified for participation in FEMA's National Flood Insurance Program (NFIP). This requirement applies to the communities listed (Calhoun, Grenada, Yalobusha Counties in Mississippi and Whitman County, Washington) and is tied to the finalized flood hazard information effective December 23, 2026.
Final flood maps effective Dec 23, 2026
FEMA made final flood hazard determinations (which may add or change Base Flood Elevations, Special Flood Hazard Area boundaries, base flood depths, or regulatory floodways) for the listed communities in Calhoun, Grenada, and Yalobusha Counties, Mississippi, and Whitman County, Washington. The new Flood Insurance Rate Maps (FIRMs) and, where applicable, Flood Insurance Study (FIS) reports will be available for inspection at the community map repositories and online at the FEMA Map Service Center by December 23, 2026. Lessees and owners of real property in those communities are encouraged to review the new or revised FIRM and FIS reports at the listed repository addresses or https://msc.fema.gov.
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Previous / Next Documents
Previous: 2026-17072, Changes in Flood Hazard Determinations
This notice lists communities where the addition or modification of Base Flood Elevations (BFEs), base flood depths, Special Flood Hazard Area (SFHA) boundaries or zone designations, or the regulatory floodway (hereinafter referred to as flood hazard determinations), as shown on the Flood Insurance Rate Maps (FIRMs), and where applicable, in the supporting Flood Insurance Study (FIS) reports, prepared by the Federal Emergency Management Agency (FEMA) for each community, is appropriate because of new scientific or technical data. The FIRM, and where applicable, portions of the FIS report, have been revised to reflect these flood hazard determinations through issuance of a Letter of Map Revision (LOMR), in accordance with Federal Regulations. The current effective community number is shown in the table below and must be used for all new policies and renewals.
Next: 2026-17074, Proposed Flood Hazard Determinations
Comments are requested on proposed flood hazard determinations, which may include additions or modifications of any Base Flood Elevation (BFE), base flood depth, Special Flood Hazard Area (SFHA) boundary or zone designation, or regulatory floodway on the Flood Insurance Rate Maps (FIRMs), and where applicable, in the supporting Flood Insurance Study (FIS) reports for the communities listed in the table below. The purpose of this notice is to seek general information and comment regarding the preliminary FIRM, and where applicable, the FIS report that the Federal Emergency Management Agency (FEMA) has provided to the affected communities. The FIRM and FIS report are the basis of the floodplain management measures that the community is required either to adopt or to show evidence of having in effect in order to qualify or remain qualified for participation in the National Flood Insurance Program (NFIP).