The winds also turned deadly. A 41-year-old man in the Sacramento suburb of Carmichael and an 82-year-old man in Yuba City, north of Sacramento, were killed by falling trees in their backyards. In the Santa Cruz Mountains, a 45-year-old man died when a tree fell onto his home on Sunday. The three deaths so far have been the only fatalities from the storm.
The atmospheric river was expected to move south into the San Diego region on Tuesday, but occasional showers and thunderstorms were still likely in Los Angeles, said Ariel Cohen, a meteorologist with the National Weather Service in Los Angeles.
Mr. Cohen said the ground was extremely saturated after what he called one of the wettest storm systems to hit the greater Los Angeles area since record-keeping began. He cautioned Angelenos to stay vigilant on Tuesday, even if the skies seemed bluer.
“It’s not going to take much rain for additional landslides, rockslides and mudslides to occur,” he said.
During a news briefing on Monday evening, Mayor Karen Bass of Los Angeles stepped away to take a call from President Biden. When she returned to the podium, she held her cellphone next to the microphone with the president still on the other end. Mr. Biden, over speakerphone, called the city’s efforts “one hell of an operation” and said he had just gotten off the phone with Gov. Gavin Newsom.
“We’ll get any help on the way as soon as you guys request it,” Mr. Biden said. “So just let me know. That’s why I’m calling.”
Jill Cowan contributed reporting from Los Angeles.