FEMA flood map notices

Flood map changes in Allen County, Kansas

FEMA has published 2 flood hazard notices covering Allen County, Kansas since November 2023. The most recent, final flood hazard determinations, was published Aug 21, 2026.

Notices for Allen County

Aug 21, 2026FinalFinal Flood Hazard DeterminationsAlso covers 4 other counties
May 20, 2025ProposedProposed Flood Hazard DeterminationsAlso covers 3 other counties · Appeal period closed Aug 18, 2025

Also covered by these notices

FEMA often studies whole watersheds, so one notice can span several counties.

What these notices mean

Proposed: FEMA has new draft flood maps. This starts a 90-day window when owners can appeal with technical data. It's the best time to act.
Final: Appeals are resolved. The new maps usually take effect about six months later, when lenders start applying the new zones.
Map revision: A Letter of Map Revision changes one stretch of the map, often after a levee, channel project or new survey.

Notices are organized by county and community, so a notice for your county doesn't mean your property is changing zones. What flood zones mean