Following weeks of dry, windy conditions that fueled multiple wildfires in Southern California, much-needed rain has arrived. While the precipitation is expected to aid firefighting efforts, authorities are also preparing for potential hazards, including toxic ash runoff and mudslides on burned hillsides.
Los Angeles County crews have been working diligently to mitigate these risks by clearing vegetation, reinforcing slopes, and bolstering roads in areas ravaged by the recent Palisades and Eaton fires. The National Weather Service predicts approximately an inch of rain over several days, but warns of the possibility of localized downpours creating dangerous debris flows in burn-scarred areas.

Protective measures are being implemented, such as the netting seen here in the Pacific Palisades neighborhood of Los Angeles, to safeguard against mudslides. (AP)
The rainfall, which began late Saturday and is anticipated to continue through early Tuesday, has prompted flood watches for some burn areas. Mountainous regions are expected to receive snowfall. Los Angeles Mayor Karen Bass issued an executive order to accelerate cleanup and minimize the environmental impact of fire-related pollutants. Similarly, Los Angeles County supervisors approved emergency measures to implement flood control infrastructure and expedite sediment removal in fire-affected zones.

Firefighters continue to work on extinguishing hot spots from the Laguna Fire in Camarillo, California. (AP)
The ash left behind in the burn areas is a hazardous cocktail of incinerated materials, including household items, building debris, and potentially toxic substances like asbestos and lead. Residents are strongly advised to wear protective gear during cleanup efforts.
The 2018 Montecito mudslides, which tragically claimed 23 lives and damaged hundreds of homes following heavy rainfall on fire-denuded slopes, serve as a stark reminder of the dangers posed by post-fire debris flows.

Ongoing efforts to extinguish hot spots from the Laguna Fire. (AP)
While the recent rain has brought some relief from the dangerous fire conditions, several wildfires, including the Palisades and Eaton fires, are still active. These fires have resulted in significant devastation, with at least 28 fatalities and over 14,000 structures destroyed. Firefighters are making headway against the Hughes Fire in northern Los Angeles County, which prompted widespread evacuations. Meanwhile, the Border 2 Fire in San Diego County remains largely uncontained.