Summary (tl;dr)

Flash flood warnings are in effect across Los Angeles and other parts of Southern California due to an "unusually strong storm system" bringing heavy, continuous rainfall, significantly increasing the risk of flash flooding, mudslides, and dangerous debris flows, especially in recent wildfire burn scar areas.

Essential Background

Southern California is currently experiencing an "atmospheric river" storm, an unusually strong weather system bringing substantial moisture from the Pacific Ocean. This multi-day event began on Friday, November 14, 2025, initiating rounds of heavy rain across the region. A critical concern stemming from this rainfall is the increased vulnerability of areas recently affected by wildfires, where burn scars make hillsides highly susceptible to rapid and destructive mud and debris flows.

The Full Story

As of Saturday, November 15, 2025, flash flood warnings have been issued and expanded across a vast portion of Los Angeles County, extending to other Southern California areas including Ventura and Santa Barbara counties. The National Weather Service (NWS) indicates that heavy rainfall is expected to continue throughout the day, with some coastal regions experiencing rainfall rates potentially reaching an inch per hour. Forecasts suggest Los Angeles could receive around 2.6 inches of rain over the weekend, while mountainous areas might see up to 4 to 6 inches, potentially making this November the wettest in Los Angeles in 40 years. Due to the severe conditions, evacuation warnings and mandatory evacuation orders have been issued for specific high-risk properties, particularly those situated in or near burn scar areas like Eaton, Palisades, and Bridge. Authorities are advising residents to avoid nonessential travel and to never attempt to drive through flooded roadways, as even shallow moving water can be extremely dangerous.

Why It Matters

The ongoing heavy rainfall and associated flash flood warnings present a significant threat to public safety and infrastructure across Southern California. The primary concerns are widespread urban and flash flooding, along with potentially devastating mud and debris flows, especially in wildfire-damaged regions where the landscape is less able to absorb water. The unusual intensity of this November storm is expected to cause substantial property damage, disrupt transportation, and significantly impact the daily lives of millions of residents throughout the affected areas.

Geographic Location

• Los Angeles County, California, United States (Burbank, Griffith Park, North Hollywood, Universal City, Pasadena, Hollywood, Van Nuys, Downtown Los Angeles, Mount Wilson, Alhambra, Beverly Hills, Encino, Northridge, Santa Clarita, Chatsworth, Woodland Hills, West Covina, Glendora, Altadena, Sunland, Pacific Palisades, Malibu, Topanga Canyon, Santa Monica, Torrance, Palos Verdes Peninsula, San Gabriel Valley, San Fernando Valley)
• Ventura County, California, United States
• Santa Barbara County, California, United States
• Orange County, California, United States
• San Diego County, California, United States
• Riverside County, California, United States
• San Bernardino County, California, United States