リアルタイム洪水影響マップ | アメリカ地質調査所

Real-Time Flood Impact Map | U.S. Geological Survey Skip to main content Official websites use .gov A .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. Real-Time Flood Impact Map July 10, 2025 Explore the Real-Time Flood Impact Map The USGS Real-Time Flood Impact (RT-FI) Map displays the locations (called “Flood Impact Locations”) where the USGS has measured the height of critical safety or infrastructure features that may be vulnerable to flood impacts. Some examples of Flood Impact Locations include stream and river embankments; roads and bridges; pedestrian paths; buildings; and more. Flood Impact Locations are surveyed and associated with a nearby USGS real-time streamgage. When the streamgage water level (or gage height) exceeds the Flood Impact Location’s surveyed height, its icon will display on the map, showing that this location may be currently flooded. When you click on the icon, the pop-up will display the current gage height and the Flood Impact Location height, so you can compare how close that location is to the current water level. Some Flood Impact Locations may be measured below the level of actual flooding to provide an early warning that flooding may be imminent. A Spanish translation of the front-end RT-FI Map interface is also available by clicking on "Español" in the upper right corner of the Map. The Real-Time Flood Impact API service is also available through the modernized Water Data APIs site . Media Sources/Usage: Public Domain. View Media Details Screenshot of the USGS Real-Time Flood Impact Map on April 9, 2025, near Indianapolis, IN. Multiple streams and rivers experienced spring flooding, overtopping their embankments and affecting nearby roads, buildings, bridges, and more. Media Sources/Usage: Public Domain. View Media Details Clicking on a flood feature icon in the USGS Real-Time Flood Impact Map will display information about that Flood Impact Location, the current conditions at the nearby USGS streamgage, and the USGS HIVIS webcam image (if available). For example, this Flood Impact Location in St. Paul, MN displayed a flooded road icon on June 30, 2024. The presence of flooding can be confirmed by the streamgage height (blue line) rising above the surveyed road height (red line) in the hydrograph, and by the floodwaters shown in the gage’s webcam that day. Contacts Athena P Clark Science Advisor/USGS Coastal Storm Coordinator Southeast Region Email [email protected] Phone 334-395-4141 Julia G Prokopec Hydrologist, National Flood Coordinator, Flood Inundation Mapping (FIM) Coordinator Upper Midwest Water Science Center Email [email protected] Phone 763-783-3158 Lauren Privette WIM Developer Upper Midwest Water Science Center Email [email protected] Phone 703-648-5315 Explore Search Maps and Mapping Water Water Resources Mission Area View All Was this page helpful?