Skip to main content
U.S. flag

An official website of the United States government

Flood Inundation Mapper

March 4, 2019

USGS Flood Inundation Maps, along with Internet information regarding current stage from the USGS streamgage, provide emergency management personnel and residents with information that is critical for flood-response activities, such as evacuations and road closures, as well as for post-flood recovery efforts.  The Flood Inundation Mapper allows users to explore the full set of inundation maps that shows where flooding would occur given a selected stream condition. Users can also access historical flood information and potential loss estimates based on the severity of the flood. The FIM Mapper helps communities visualize potential flooding scenarios, identify areas and resources that may be at risk, and enhance their local response effort during a flooding event.

Screenshot of the new USGS Flood Inundation Mapper
Screenshot of the new USGS Flood Inundation Mapper. This screenshot was taken during Minor Flooding Stage (National Weather Service) in Old Shawneetown, Illinois, on April 7, 2020.