California prepares for mudslides and flooding following fires

California Governor Gavin Newsom issued an executive order on January 12, 2025, to accelerate removal of debris and mitigate the potential for mudslides and flooding in areas burned.

The executive order states that rebuilding efforts cannot begin on impacted property until hazardous and other debris is removed from that property.

According to the executive order, the fires created burn scars that can pose additional risks to communities. Rainfall on burned soil does not absorb at normal rates which can lead to run off, flash floods, mudslides and debris flows into waterways.

The U.S. Geological Survey (USGS) states that post-fire landslide hazards include fast-moving, highly destructive debris flows that can occur following wildfires. This can occur following heavy rainfall events due to root decay and loss of soil strength.

“We’re working in real-time to ensure a fast and organized effort – giving Angelenos the tools they need to rebuild faster and stronger,” said Governor Newsom in a press release. “California has been here before: we know what effective wildfire recovery requires, and we’re using that experience to move faster than ever to support those impacted by these devastating fires.”

California still faces much of its winter season ahead. According to the California Office of Environmental Health Hazard Assessment, the state receives roughly 75% of its annual precipitation from November through March, with about 50% occurring from December through February.

An increase in rainfall could create a greater risk for flooding and mudslides.

“The road ahead is difficult but California is doing all we can to help Los Angeles rebuild and move forward,” Governor Newsom said in a press release.