A 3.6-mile stretch of Topanga Canyon Boulevard/State Route 27 between Pacific Coast Highway and Grand View Drive will close Thursday, ahead of a forecast rainstorm and possible debris flows, Caltrans said Wednesday.

The closure is scheduled to begin at 5 a.m. Thursday and will remain in effect until further notice.

The National Weather Service is predicting a 100% chance of rain on Thursday, with up to three-quarters of an inch of precipitation. Canyon rockslides and moderate flooding are possible, officials said.

Crews will assess road conditions on Thursday morning and will reopen the highway as soon as it is safe to do so. Motorists should expect the highway to remain closed until further notice.

Officials warned that the conditions may pose hazards for both crews and motorists. They also said drivers should expect delays, use caution, and turn on headlights in the rain.

Caltrans said travelers should plan for alternate routes and avoid driving during the rainstorm, especially through the areas affected by the fires.  

Crews have set up barriers along State Route 27 and along Pacific Coast Highway between Sunset Boulevard and Carbon Beach Terrace.

The affected stretch of State Route 27 is an active work zone for ongoing recovery efforts from the Palisades Fire and winter storms.

Motorists can check current traffic conditions on the Caltrans Quickmap.



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