One of the victims, a 55-year-old man, was electrocuted when a falling tree downed power lines which hit his auto in Los Angeles, while a second victim was found dead in a submerged vehicle in nearby San Bernardino County.
Air travel was also in disarray, with hundreds of flights canceled at Burbank, Los Angeles International and John Wayne airports.
In the Studio City area of Los Angeles, a sinkhole swallowed two cars, the second on live TV as viewers watched it teeter on the edge before plunging in.
California was bracing on Saturday for another wave of torrential rain as well as heavy snow as a massive storm triggered flooding, mudslides and power outages and killed two people, officials said.
It said the northern part of the state - where flooding last week damaged the Lake Oroville dam and forced the evacuation of almost 200,000 people - was not expected to have heavy rainfall.
"Stronger southerly winds and widespread flooding will be likely as an atmospheric river (of moisture) takes aim somewhere along the central California Coast", a weather statement warned. Additionally, one driver drowned in his vehicle after flash flooding suddenly overtook the roadway. Some areas may get up to 10 inches.
Authorities in San Bernardino County say a motorist has been found dead after a auto was submerged on a flooded desert road in Victorville.
Downed trees and power lines are viewed near a school in downtown Los Angeles, Feb. 17, 2017.
Whoopi Goldberg Defends Tiffany Trump Against NYFW Backlash
On Tuesday, Tiffany was spotted at the Dennis Basso show sitting in the front row alongside her friend, designer Andrew Warren . And the snaps were even discussed on popular American TV show The View , with Whoopi Goldberg also defending Tiffany.
In Northern California, officials monitoring the stricken Oroville Dam on the Feather River said they were confident the reservoir would handle any runoff from expected storms because ongoing releases have been lowering the lake's level since its spillways were damaged last week.
Higher elevations can expect high winds and heavy snowfall. The wettest location so far in the state is the San Marcos Pass in Santa Barbara County, with 5.28 inches of rain in the same time frame.
Snow levels were anticipated to be 8,000 feet Friday night, lowering to 6,000 feet on Saturday, according to the National Weather Service. Both the Los Angeles Department of Water and Power and Southern California Edison reported tens of thousands of customers without power by late Friday.
Rainfall totals by the National Weather Service showed parts of Santa Barbara County had seen more than 7 inches of rain in two days.
Rainfall was expected to increase substantially in Orange and L.A. counties, which could see anywhere from three to five inches of rain and perhaps flash flooding by the evening, ABC News reported. Another storm is expected to move into the area early next week, following a short break on Sunday.
Rainfall predictions in that region's foothills and mountains ranged from 3 inches to 10 inches. Though the rain is welcome after years of drought, the relentless nature of the storms has been somewhat wearing, Mayberry said.
As the heavy rains drenched the area, Duarte, a city northeast of Los Angeles, issued a mandatory evacuation order for residents of 200 homes.