USGS Flood Information

Science Center Objects

The USGS collects flood data and conducts targeted flood science to help Federal, State, and local agencies, decision makers, and the public before, during, and after a flood. Our efforts provide situational awareness, drive predictive models, inform infrastructure design and operation, undergird floodplain mapping, assist flood constituent/load quantification, and facilitate flood impact assessments.

Use this website to discover real-time and historic flood data and scientific investigations, and learn how we collect data while addressing logistical and technical challenges.


USGS Flood Current Conditions and Notifications

The USGS offers multiple products that allow our stakeholders and the public to be notified of high-flow conditions and USGS flood response activities:

  • WaterWatch: Access current flood and high-flow conditions (image below), along with other streamflow information
  • Regional and Local Flood Alerts: View current and historical alerts of flooding and response activities; subscribe to RSS feeds
  • WaterAlert: The WaterAlert service sends e-mail or text (SMS) messages to you when certain parameters (including streamflow and gage height/stage) exceed user-definable thresholds, as measured by a USGS real-time data-collection station. Use the WaterAlert map to create your custom notifications.
  • WaterNow: When you email or text the WaterNow service with USGS gage or site number, WaterNow will reply with the most recent observation.
Explanation image for WaterWatch Map

Other USGS Flood Resources

Flood Event Viewer

Flood Inundation Mapping

USGS Storm-Tide Monitoring

Water Data for the Nation

U.S. Water Monitor


Flood Resources from our Partners

Screenshot of National Water Service's river observations and forecast website

National Weather Service River Observations and Forecast

National Weather Service Riverwatch: Mississippi River Basin Forecasts

U.S Army Corps of Engineers Flood Risk Management Program

Esri Disaster Response Program: Flooding