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The CGS Burned Watershed Geohazards (BWG) Program conducts rapid documentation of postfire geohazard events, including floods, debris flows, and landslides. This work complements the program’s Watershed Emergency Response Team (WERT) assessments by documenting events after they occur. These post-event observations from recently burned watersheds provide valuable data for the scientific and engineering community to train geohazard models, understand triggering conditions, evaluate mitigation measures, and better prepare for future events.
This webpage provides access to public-facing post-event reports for events from 2023 to present. It also includes other reports produced by the Burned Watershed Geohazards Program, such as regional postfire geohazard modeling efforts, that may not involve responses to specific events.
Click on the boxes below to explore the post-event assessments and download reports for recent events. To explore post-fire WERT assessments, click here.
Updated March 17, 2026
In 2025, the CGS Burned Watershed Geohazards Program produced the following post-event reports:
No public post-event reports were generated for 2024 events.
In 2023, the CGS Burned Watershed Geohazards Program produced the following post-event and modeling reports:
Select any photo to open it full size in a new window.
This time-lapse video was captured in the Oak Glen community in San Bernardino County on September 12, 2022, and shows the destructive potential of postfire debris flows:
Web page by: California Geological Survey - Burned Watershed Geohazards Program
