At least eight people are dead amid mudslides in Southern California, where heavy rains triggered flooding and massive run-off, US media report.
“Waist-deep” mudslides in areas scorched by wildfires last month shut down more than 30 miles (48km) of the main coastal highway, officials say.
A source at the Santa Barbara Sheriff’s office tells BBC News that the death toll is expected to climb.
At least 25 people were injured and thousands fled amid the deluge.
More than 50 rescues have so far been performed.
The hardest hit homes were those that were not in the evacuation zone, official say.
Heavy rain run-off caused waist-deep mudflow in the Montecito, where some homes were knocked from their foundations, said Santa Barbara County Fire Department spokesman Mike Eliason.
Boulders the size of small cars were rolling down hillsides, and blocking roads, reports BBC News Los Angeles correspondent James Cook.
Among those taken to safety was a 14-year-old girl who had been trapped for hours in the ruins of her home.
The fire department published a picture of the girl encased in mud as she was led to safety.
County Fire Captain Dave Zaniboni said that five people were found dead on Tuesday in Montecito and may have been killed as result of the storm.
The US Coast Guard has sent “multiple airships to support rescue operations” and warn the public not to fly drones, otherwise the flights will force to be grounded.
Wildfires in December, including the Thomas Fire, swept through the area burning vegetation that helps prevent flooding and landslides.
Thousands of California residents were asked to evacuate on Monday for the second time in two months.
In Burbank, where waves of mud swept away vehicles, officials issued a mandatory evacuation order.
Homeowners in the area shared photos of mud in their homes.
Several roads are closed due to mudslides and debris, including the major thoroughfare Highway 101.
After a wildfire, burned vegetation and charred soil create a water repellent layer which blocks water absorption and leads to an increased risk of mudslides and floods.
“Recent burn areas will be especially vulnerable where dangerous mud and debris flows are possible,” said the National Weather Service in a statement.
The Federal Emergency Management Agency shared a warning for California homeowners explaining that homes that had never flooded before were now at risk.
About 30,000 residents were under evacuation orders on Monday.
This comes after a record-setting year of $306 billion (£226 billion) of weather and climate-related disaster costs in the United States, the third warmest year on record, according to the US National Oceanic and Atmospheric Administration.
The storm over California is expected to produce 4 inches to 7 inches (10 to 18 cm) in the foothills and 9in (23cm) in select areas.
Snow is falling at higher elevations, according to the National Weather Service.