Los Angeles dug out Saturday from a massive storm that slammed into Southern California, killing four residents as it flooded freeways, prompted mudslides and blew down trees and power lines, leaving tens of thousands in the dark.

The downpour that began Friday borne on winds up to 80 mph dumped as much as 2 inches on downtown Los Angeles and 4 inches of rain on the San Fernando Valley.

Showers continued Saturday across the Southland intermingled with bursts of sunshine as a flash flood watch continued into the morning.

Another storm was expected to roll in Sunday night, with a 40 percent to 50 percent chance of rain through Monday, and light intermittent showers through Wednesday, forecasters said. But the next storm is only expected to bring light rain, or between .005 and .15 inches.

“We’re looking at a break Sunday, with some isolated showers in the mountains, with rainfall slated to resume Sunday evening into Monday,” said Carol Smith, a meteorologist at the National Weather Service based in Oxnard.

The storm that rolled in Friday dumped several inches of rain across the region, bringing the rainfall tally for downtown Los Angeles to 18.35 inches since Oct. 1 — nearly double the normal 9.56 inches.

The torrential rain and heavy winds had wreaked havoc across the San Fernando and Santa Clarita valleys, electrocuting one man by a downed power line, trapping motorists in more than 2 feet of water on the 5 Freeway, stranding thousands without power, and a leaving a swath of property damage.

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On Friday, firefighters rescued at least eight people from “swift-moving” water at San Fernando Road and Tuxford Street in Sun Valley as well as in flooded areas of the Sepulveda Basin. On the 5 Freeway, reports said water had risen to 2 1/2 feet.

Friday’s storm, said to be the biggest in a decade in drought-stricken L.A., got off to a slow start. But by noon, it came with a vengeance, bolstered by strong winds that brought a flurry of reports of downed power lines and trees toppling onto homes and cars.

“We have stuff all over the Valley,” said Los Angeles Fire Department Capt. Daniel Curry on Friday afternoon. “It’s been very busy.”

In Sherman Oaks, a 55-year-old man was electrocuted after a tree branch fell, taking out power lines and landing on a vehicle. The unidentified man apparently was touched by the electrified line or somehow had contact with the charged water, police said.

In Lake Balboa, Los Angeles firefighters plucked three people out of the water from within the flooded Sepulveda Basin. One of the rescued was treated at a nearby hospital, fire officials reported.

Meanwhile, a Swift Water Rescue Team employed an inflatable boat to whisk four others and two dogs to safety.

• PHOTOS: Rain drenches the San Fernando Valley

In Studio City, two vehicles were swallowed by a 20-foot sinkhole, with firefighters rescuing a woman who had escaped her car but was found standing atop her overturned vehicle.

The giant hole at Woodbridge Street just west of Laurel Canyon Boulevard was likely caused by the heavy rain and potential failure of an 89-year-old sewer pipe, say city engineers. All the wastewater was contained in the sewer..

Laurel Canyon Boulevard remained closed Saturday between Moorpark Street and Valley Spring Lane, while Woodbridge Street was closed east of Laurel Canyon, while crews work to repair the pipe.

“The good news is sewage is still flowing,” said Gary Lee Moore, city engineer for the Department of Public Works, gazing toward the giant hole. “We don’t want a collapse here to cause sewage to back up.”

As many as 150 downed power lines wreaked havoc across the city, with trees toppling on homes and cars. As many as 100,000 residents were without power.

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In Westwood, near the UCLA campus, one apartment resident came inches away from injury when a 75-foot tree crashed through the roof, landing inches from a bed the resident was lying on, according to the Fire Department.

The storm prompted hundreds of flight cancellations throughout the region, stranding would-be travelers at local airports.

Of the four deaths attributed to the storm, rescuers found one person dead inside a submerged car In Victorville, while two passengers died in separate crashes on the rain-slickened 15 Freeway in Mira Mesa and City Heights.

As of 4 a.m. Saturday, 2.04 inches had fallen on downtown, 3.05 inches on Chatsworth, 3.37 inches on Northridge, 3.3 inches on Van Nuys and 4.15 inches on Woodland Hills. As much as 6.46 inches fell on Westlake Village, the National Weather Service reported.

Meanwhile, as of 2 p.m., 50,000 Los Angeles homes and businesses were without power, a spokeswoman said, as L.A. Department of Water and Power crews worked to turn the lights back on.

All lanes were reopened on the 5 Freeway through Sun Valley area after heavy flooding had shut down the freeway.