Cleanup efforts are underway across Malibu and the Santa Monica Mountains after a powerful winter storm lashed Southern California with heavy rain, triggering mudslides, debris flows, road closures, and hazardous ocean conditions. While crews have made steady progress clearing roads and restoring access, forecasters warn that additional rain this week could complicate recovery efforts.
The National Weather Service issued multiple advisories as the storm system moved through the region, including a High Surf Advisory through Feb. 20 at 10 p.m., a Flood Watch and a Wind Advisory. Approximately 1.25 inches of rain fell in some areas, with more forecast in the coming days. Another storm system is expected to move in overnight Tuesday into Wednesday morning, with yet another round of rain possible Thursday. NOAA predicts 2 to 4 inches of additional rainfall for the Santa Monica Mountains this week.
Monday’s storms brought significant mud and debris flows to State Route 27, also known as Topanga Canyon Boulevard, particularly within areas already weakened by the Palisades Fire burn scar. At least eight locations along the 3.6-mile stretch between Pacific Coast Highway and Grand View Drive were blocked by debris. The roadway remains closed as crews continue clearing operations and assessing slope stability.
Along Pacific Coast Highway, damage included a collapsed wall north of Porto Marina Way, reducing northbound traffic to one lane. Mud and debris also forced lane reductions just south of Topanga Canyon Boulevard. Motorists are advised to avoid unnecessary travel during storm conditions and to check current traffic updates via Caltrans’ Quickmap before heading out.
Authorities stress that drivers should never attempt to cross flooded roadways. Standing water can be deeper than it appears and may conceal structural damage. Under California law, motorists must treat malfunctioning traffic signals as four-way stops. Officials also urge drivers to watch for crews and heavy equipment working along roadways.
Heavy surf, strong rip currents, and beach erosion have also created dangerous coastal conditions. While beaches remain open, the public is urged to stay out of the water, off rocks and jetties, and keep a safe distance from the water’s edge. Significant debris from coastal bluffs and recent fire zones may wash ashore.
Crews are also monitoring the recovery work zone on PCH between Carbon Beach Terrace and Sunset Boulevard, which experienced minor impacts during the storm. One lane of northbound PCH remains closed for approximately a quarter-mile in two locations: north of Porto Marina Way and south of Topanga Canyon Boulevard.
Caltrans District 7 will continue providing updates via news releases and social media. Motorists can check current traffic conditions using the Caltrans QuickMap.
The affected stretch of SR-27 remains an active work zone tied to ongoing recovery efforts from the Palisades Fire and winter storms and is typically closed to the public from midnight to 5 a.m. daily.
