FEMA flood map notices
Flood map changes in Onslow County, North Carolina
FEMA has published 2 flood hazard notices covering Onslow County, North Carolina since November 2023. The most recent, proposed flood hazard determinations, was published Jul 18, 2025.
Notices for Onslow County
- Jul 18, 2025ProposedProposed Flood Hazard DeterminationsAlso covers 1 other county · Appeal period closed Oct 16, 2025
- Sep 26, 2024FinalFinal Flood Hazard DeterminationsAlso covers 12 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