FEMA flood map notices
Flood map changes in Iowa
Since November 2023, FEMA has published flood hazard notices covering 14 of Iowa's 99 counties.
| County | Notices | Most recent | Appeal window |
|---|---|---|---|
| Black Hawk County | 4 | Sep 10, 2026 | — |
| Linn County | 3 | Aug 6, 2026 | — |
| Story County | 1 | Jun 11, 2026 | — |
| Des Moines County | 2 | Jan 29, 2026 | — |
| Worth County | 1 | Jan 21, 2026 | — |
| Polk County | 3 | Oct 2, 2025 | — |
| Johnson County | 2 | Aug 20, 2025 | — |
| Warren County | 2 | Aug 12, 2024 | — |
| Lee County | 1 | Apr 18, 2024 | — |
| Louisa County | 1 | Apr 18, 2024 | — |
| Woodbury County | 1 | Apr 1, 2024 | — |
| Dallas County | 1 | Jan 5, 2024 | — |
| Scott County | 1 | Nov 20, 2023 | — |
| Fayette County | 1 | Nov 3, 2023 | — |
All counties in Iowa
- Adair County
- Adams County
- Allamakee County
- Appanoose County
- Audubon County
- Benton County
- Black Hawk County
- Boone County
- Bremer County
- Buchanan County
- Buena Vista County
- Butler County
- Calhoun County
- Carroll County
- Cass County
- Cedar County
- Cerro Gordo County
- Cherokee County
- Chickasaw County
- Clarke County
- Clay County
- Clayton County
- Clinton County
- Crawford County
- Dallas County
- Davis County
- Decatur County
- Delaware County
- Des Moines County
- Dickinson County
- Dubuque County
- Emmet County
- Fayette County
- Floyd County
- Franklin County
- Fremont County
- Greene County
- Grundy County
- Guthrie County
- Hamilton County
- Hancock County
- Hardin County
- Harrison County
- Henry County
- Howard County
- Humboldt County
- Ida County
- Iowa County
- Jackson County
- Jasper County
- Jefferson County
- Johnson County
- Jones County
- Keokuk County
- Kossuth County
- Lee County
- Linn County
- Louisa County
- Lucas County
- Lyon County
- Madison County
- Mahaska County
- Marion County
- Marshall County
- Mills County
- Mitchell County
- Monona County
- Monroe County
- Montgomery County
- Muscatine County
- O'Brien County
- Osceola County
- Page County
- Palo Alto County
- Plymouth County
- Pocahontas County
- Polk County
- Pottawattamie County
- Poweshiek County
- Ringgold County
- Sac County
- Scott County
- Shelby County
- Sioux County
- Story County
- Tama County
- Taylor County
- Union County
- Van Buren County
- Wapello County
- Warren County
- Washington County
- Wayne County
- Webster County
- Winnebago County
- Winneshiek County
- Woodbury County
- Worth County
- Wright County
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