Rare October storm soaks Southern California as heavy rain drenches areas impacted by January wildfires

A rare-for-California Severe Thunderstorm Watch was issued for parts of Southern California, including Los Angeles, through Tuesday morning. This marked the first Severe Thunderstorm Watch for the Los Angeles area in more than 17 years, since Jan. 27, 2008.

LOS ANGELES – Southern California is drying out after a potent severe storm system brought strong thunderstorms and bursts of record-setting rain, which caused localized flash flooding and prompted evacuation warnings for parts of Los Angeles that are particularly vulnerable to mudslides.

This area included Pacific Palisades, which was devastated by January's wildfire disaster. All evacuation warnings have since been lifted.

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Evacuation warnings were issued for areas impacted by the Palisades, Hurst and Sunset fires.

Los Angeles officials said Monday night that mandatory evacuations were ordered for 114 homes within the greater evacuation warning for properties deemed to be at greatest risk of mudslides or debris flows. Officials said police officers went door to door visiting those high-risk homes.

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Other locales under the evacuation warning included Malibu, Topanga Canyon, Mandeville Canyon, Altadena and other communities in the foothills of the San Gabriel Mountains.

Mandatory evacuations were also issued for parts of Orange County, and San Luis Obispo County issued shelter-in-place orders for people living inside the Gifford and Madre Fire burn scars.

According to the National Weather Service, ash from wildfires creates burn scars – a water-repellent coating that prevents the ground from absorbing water and causes the area to be predisposed to flash flooding and debris flows.

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The San Gabriel Mountains reported some rainfall totals of over 5 inches, but most areas around the greater Los Angeles area received between 3 and 5 inches of rain.

Scotland, California, in the San Bernardino Mountains, tallied nearly 6 inches of rain, leading rainfall totals across the state Tuesday.

Burbank recorded 2.37 inches of rain Tuesday, becoming the rainiest October day in the city's history.

Late Tuesday morning, the roof of a movie studio in Burbank collapsed from heavy rain, according to FOX 11 Los Angeles

Wind gusts even reached hurricane-force in Los Angeles County, where Acton recorded a gust of 73 mph.

Flash flooding covers major roads

The Pacific Coast Highway in Huntington Beach was closed in the southbound direction due to flooding on Tuesday afternoon, CalTrans reported. 

Heavy rain also pelted Malibu during the morning rush Tuesday. The City of Malibu announced that Topanga Canyon was closed and warned drivers about rockfalls in Malibu Canyon. 

The northbound lanes of busy Interstate 5 were also closed due to flooding north of Burbank in Sun City for a period Tuesday afternoon. Two lanes reopened later in the evening.

A rare-for-California Severe Thunderstorm Watch was issued for parts of Southern California, including Los Angeles, through Tuesday morning. This marked the first Severe Thunderstorm Watch for the Los Angeles area in more than 17 years, since Jan. 27, 2008.

Storm brings heavy rain to Bay Area, snow to Sierra Nevada

Heavy rain from the same storm system doused Northern California on Monday, including the San Francisco Bay Area.

Video from Monday night showed flooding on Interstate 280 near San Jose, which trapped several cars that had to be towed out of high waters.

The same system will also bring snow to the Sierra Nevada mountain range at elevations higher than 6,000 feet, with 2-3 feet of snow expected at the highest peaks. CalTrans closed the Sonora Pass last Friday ahead of the storm.

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