Emergency Assessment of Post-Fire Debris-Flow Hazards

Wildfire can significantly alter the hydrologic response of a watershed to the extent that even modest rainstorms can produce dangerous flash floods and debris flows. The USGS conducts post-fire debris-flow hazard assessments for select fires in the Western U.S. We use geospatial data related to basin morphometry, burn severity, soil properties, and rainfall characteristics to estimate the probability and volume of debris flows that may occur in response to a design storm.

Current and Previous Year Fires

Click on map to view information for each site. (All older fires are listed under Hazard Assessments section below)

Hazard Assessments

2016 Fires

2015 Fires

2014 Fires

2013 Fires