California walloped by winter storm with high winds and heavy rain and snow

California was walloped Monday by a powerful winter storm carrying treacherous thunderstorms, high winds and heavy snow in mountain areas.

Millions of Los Angeles County residents faced flash flood warnings as rain pounded the region and people in some areas scarred by last year’s devastating wildfires were under an evacuation warning through Tuesday because of the potential for mud and debris flows.

Los Angeles Mayor Karen Bass ordered emergency crews and city departments to be ready to respond to any problems.

The storm wreaked havoc on roadways spanning from Sonoma County to the Sierra Nevada. Traffic was halted temporarily in both directions on I-80 near the Nevada state line due to spinouts and crashes, the California Department of Transportation reported. In Santa Barbara County, a large tree toppled onto US-101, shutting down southbound lanes.

Forecasters said the western slope of the Sierra Nevada, northern Shasta County — including portions of Interstate 5 — and parts of the state’s Coast Range could see up to 8 feet (2.4 meters) of snow before the storm moves through late Wednesday. The heavy snow, wind and low visibility could also make travel conditions dangerous to near impossible, forecasters added.

“It has seemed ‘springlike’ for a large part of 2026, but winter is set to show it’s not quite done ...