California Storm Closes Roads, Triggers Flood Warnings

Heavy rain and snow expected to continue through the week

Published on Feb. 18, 2026

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A powerful storm has swept across California, closing major roads like Highway 1 in Big Sur and Topanga Canyon Road in Los Angeles County due to debris flows and mudslides. The National Weather Service has issued flood watches and winter storm warnings, with heavy rain and snow expected to continue through the end of the week. Some areas have already seen over 3 inches of rain, and forecasters predict up to 4 inches in coastal and valley regions and up to 8 inches in the mountains.

Why it matters

The storm is causing major disruptions to transportation and raising concerns about flash flooding, debris flows, and other dangerous conditions across much of Southern California. The impacts could be especially severe in areas recently affected by wildfires, where the burned landscape is more prone to mudslides and debris flows.

The details

The storm has already led to the closure of a section of Highway 1 through Big Sur due to rockslides and debris in the roadway. In Los Angeles County, a stretch of Topanga Canyon Road has also been shut down after crews responded to at least eight debris flows inundating the road. The National Weather Service has issued a flood watch for much of Southwest California, including Los Angeles, Ventura, San Luis Obispo and Santa Barbara counties, warning of the risk of flash flooding, rock and mudslides, and burn-scar debris flows.

  • The storm arrived in the region on Monday, February 17, 2026.
  • As of Tuesday morning, February 18, 2026, most of the Southland had received over an inch of rain, with some locations recording over 3 inches.
  • The storm is expected to continue through the end of the week, with forecasters predicting up to 4 inches of rain in coastal and valley areas and up to 8 inches in the mountains.

The players

California Department of Transportation

The state agency responsible for maintaining and repairing California's roads and highways.

National Weather Service

The federal agency that provides weather forecasts and warnings for the United States.

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What they’re saying

“It's going to be a very soggy, wet period over much of the week.”

— Mike Wofford, Meteorologist, National Weather Service (Los Angeles Times)

What’s next

Authorities will continue to monitor the storm and road conditions, and may issue additional closures or warnings as needed. Residents in affected areas should be prepared for potential flooding, debris flows, and hazardous driving conditions.

The takeaway

This powerful storm is a stark reminder of the ongoing challenges California faces with extreme weather events, which are becoming more frequent and severe due to climate change. The impacts on transportation and public safety underscore the importance of infrastructure resilience and emergency preparedness in communities across the state.