California faces flooding, mudslides as rain storm inundates state

Flood watches extend from San Diego to Redding.

Thirty-seven million Californians are on alert for flooding as an atmospheric river continues to inundate the state with rain.

Life-threatening flash flooding and mudslides are a threat in Southern California, from Los Angeles to Oceanside, just north of San Diego, as the rain pounds the already saturated ground.

Parts of California have seen 6 to 10 inches of rain over the last several days.

Downtown Los Angeles has recorded 11.87 inches of rain so far this month, marking the city's wettest February since 1998.

On average, Los Angeles sees a total of 3.64 inches of rain throughout February.

With 13.92 inches of rain recorded in Los Angeles so far this year, the city is closing in on its average yearly rainfall total of 14.25 inches.

Flood watches on Tuesday extend from Redding in Northern California to San Diego in Southern California.

Rounds of rain will continue across Southern California into early Wednesday, with more flash flooding, mudslides and rockslides possible.

Winter weather advisories are also in effect from the Sierra Nevada mountains to the Central Rockies. Heavy mountain snow will continue to pile up into Wednesday morning before shifting into the Rockies by Wednesday afternoon.

The storm will leave California by Wednesday afternoon, with just some lingering rain and snow showers for the northern part of the state.

ABC News' Dan Peck contributed to this report.