FEMA flood map notices
Flood map changes in Knox County, Tennessee
FEMA has published 2 flood hazard notices covering Knox County, Tennessee since November 2023. The most recent, map revision flood hazard determinations, was published Jun 11, 2026.
Notices for Knox County
- Jun 11, 2026Map revisionChanges in Flood Hazard DeterminationsAlso covers 34 other counties
- Jan 29, 2026Map revisionChanges in Flood Hazard DeterminationsAlso covers 28 other counties
Also covered by these notices
FEMA often studies whole watersheds, so one notice can span several counties.
- Benton County, AR
- Glades County, FL
- Hillsborough County, FL
- Lake County, FL
- Lee County, FL
- Orange County, FL
- Palm Beach County, FL
- Sarasota County, FL
- Walton County, FL
- Douglas County, GA
- Gwinnett County, GA
- Hall County, GA
- Will County, IL
- Baltimore County, MD
- Bay County, MI
- Macomb County, MI
- Shiawassee County, MI
- Harrison County, MS
- Alamance County, NC
- Jackson County, NC
- Lincoln County, NC
- Maury County, TN
- Williamson County, TN
- Bexar County, TX
- Brazos County, TX
- Collin County, TX
- Dallas County, TX
- Denton County, TX
- Ellis County, TX
- Grayson County, TX
- Harris County, TX
- Hays County, TX
- Tarrant County, TX
- Williamson County, TX
- Chesterfield County, VA
- Henrico County, VA
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