The high risk for flash flooding continues Monday for California — after the UCLA area clocked nearly 10 inches of rain and a month’s worth of rain fell in downtown Los Angeles on Sunday. 

About 80% of flood-related damages and 40% of flood-related fatalities occur on days when high-risk warnings for heavy rainfall and flash flooding are issued by the NOAA’s Weather Prediction Center. 

As of Monday morning, torrential rain is drenching Southern California, and flash flooding and debris flows have been reported the Hollywood Hills area. 

The highest flash flood risk stretches from Los Angeles to Long Beach and inland toward Big Bear Lake. The downpour will continue Tuesday from Los Angeles to San Diego and move into parts of Arizona, and showers will linger into Wednesday.

Three people were rescued from a tree in San Bernardino County early Monday after the car they were in got “submerged in rapid flood waters,” fire officials said.

A swift water rescue team responded to the three stranded people around 12:30 a.m. at Keenbrook Road west of Cajon Boulevard, San Bernardino County Fire said. 

All three were successfully rescued, the department in an update after 2 a.m. They did not suffer any injuries but were being evaluated for hypothermia. 

Eyewitness video captured the Mission Creek starting to overtop a road bridge in Santa Barbara during yesterday’s storm.

SANTA BARBARA, Calif. — Residents who had stayed put in downtown Santa Barbara were being urged to leave their homes by police who were going door-to-door in an armored vehicle last night.

An entire intersection was underwater and creeks had overflowed. Santa Barbara County Sheriff Bill Brown converted Friday night’s evacuation warnings for two areas to mandatory evacuations effective early Saturday afternoon.

Lights are reflected along a wet street in San Francisco, as atmospheric river storms approached yesterday.

The total rainfall for parts of Southern California could reach between 8 and 14 inches over a 48-hour period, deepening the risk of flooding as the atmospheric river moves over the state, the National Weather Service said in an updated forecast at 12 a.m. PT (3.a.m ET) today.

"Ongoing showers and thunderstorms will continue to produce very heavy rainfall," the update said, adding that a high risk of excessive rainfall was likely to continue, with 5 to 8 inches possible today alone.

"Increasingly saturated conditions and ongoing flooding will be further exacerbated by this additional rainfall, continuing the threat for life-threatening, locally catastrophic flash, urban, and small stream flooding, as well as a threat for debris flows and mudslides," the NWS said.  

Meanwhile, 2 to 3 inches of rain are expected in mountainous regions higher than 5,000 feet, with winds of up to 60 mph creating hazardous whiteout conditions.

The deluge of rain falling on Los Angeles is officially record-breaking: Downtown LA received 4.1 inches of rain yesterday, smashing the previous daily record for February of 2.55 inches, set way back in 1927, the city's National Weather Service station said on X.

It was the third wettest day for February since 1877 and tied for the 10th wettest day overall. The actual wettest day ever was in 1938 when 5.88 inches fell.

Vehicles and farm equipment are flooded at the Mickelson Pumpkin Patch in Petaluma, Calif., yesterday.

The extreme weather events battering much of California ARE set to continue throughout today and beyond, according to NBC News Meteorologist Michelle Grossman.

Speaking on Early Today this morning, she said: "This continues to be a really tough situation. We're looking at that life-threatening flash flooding continuing throughout tomorrow, continuous rain, heavy snow — we're going to be measuring the snow in feet."

She continued: "And we're looking at the chance of more mudslides, evacuations and power outages because those winds are going to be gusting."

Some 38 million people are affected by flood warnings while in higher areas moving into Nevada and Utah some 30 million are under wind alert warnings, she said.

Tomorrow will bring more heavy rain across southern California and more snow in the mountains.