FEMA flood map notices

Flood map changes in New Castle County, Delaware

FEMA has published 13 flood hazard notices covering New Castle County, Delaware since November 2023. The most recent, map revision flood hazard determinations, was published Jun 11, 2026.

Notices for New Castle County

Jun 11, 2026Map revisionChanges in Flood Hazard DeterminationsAlso covers 39 other counties
Jan 21, 2026Map revisionChanges in Flood Hazard DeterminationsAlso covers 31 other counties
Dec 18, 2025Map revisionChanges in Flood Hazard DeterminationsAlso covers 25 other counties
Dec 18, 2025Map revisionChanges in Flood Hazard DeterminationsAlso covers 34 other counties
Aug 20, 2025Map revisionChanges in Flood Hazard DeterminationsAlso covers 37 other counties
Aug 6, 2025Map revisionChanges in Flood Hazard DeterminationsAlso covers 19 other counties
Jan 8, 2025Map revisionChanges in Flood Hazard DeterminationsAlso covers 31 other counties
May 16, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 24 other counties
Apr 18, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 24 other counties
Mar 21, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 23 other counties
Feb 16, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 18 other counties
Jan 22, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 27 other counties
Jan 11, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 25 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