FEMA flood map notices

Flood map changes in Johnson County, Kansas

FEMA has published 16 flood hazard notices covering Johnson County, Kansas since November 2023. The most recent, map revision flood hazard determinations, was published Aug 21, 2026.

Notices for Johnson County

Aug 21, 2026Map revisionChanges in Flood Hazard DeterminationsAlso covers 27 other counties
Jul 9, 2026Map revisionChanges in Flood Hazard DeterminationsAlso covers 25 other counties
Jun 11, 2026Map revisionChanges in Flood Hazard DeterminationsAlso covers 27 other counties
May 18, 2026Map revisionChanges in Flood Hazard DeterminationsAlso covers 26 other counties
Jul 18, 2025Map revisionChanges in Flood Hazard DeterminationsAlso covers 25 other counties
Mar 12, 2025Map revisionChanges in Flood Hazard DeterminationsAlso covers 18 other counties
Mar 12, 2025Map revisionChanges in Flood Hazard DeterminationsAlso covers 22 other counties
Feb 24, 2025Map revisionChanges in Flood Hazard DeterminationsAlso covers 27 other counties
Jan 16, 2025Map revisionChanges in Flood Hazard DeterminationsAlso covers 20 other counties
Dec 18, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 12 other counties
Dec 6, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 14 other counties
Oct 22, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 24 other counties
Sep 26, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 22 other counties
May 31, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 55 other counties
Jan 5, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 47 other counties
Dec 15, 2023Map revisionChanges in Flood Hazard DeterminationsAlso covers 22 other counties

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