An atmospheric river is bringing historic rainfall to Southern California.
A second storm within one week is pummeling California with heavy rain and life-threatening flooding.
Gov. Gavin Newsom has issued a state of emergency for counties including Los Angeles, Santa Barbara and Ventura, where floodwaters and mudslides have swept through roadways.
President Joe Biden told California Gov. Gavin Newsom and Los Angeles Mayor Karen Bass he is committed to helping communities impacted by the monster storms with "any and all federal support requested."
Los Angeles Fire Department personnel rescued a man and his dog from the Los Angeles River Monday.
Around 2:45 p.m. PT, authorities received a report from a bystander that a man had jumped into the water to rescue his dog. Fire crews responded and found that the dog had managed to swim to the edge and escape the rapids.
Firefighters rescue man who was trying to save dog from rushing water
The LAFD Air Operations lowered a rescuer into the water and they were able to grab the man, who was still conscious. They were hoisted into the aircraft, LAFD said, and the patient was taken to a local hospital.
The dog was taken to a shelter for temporary care.
At a press conference Monday night, officials said LA County Fire had rescued 16 people from flooding conditions and five cats.
-ABC News' Marilyn Heck
A flash flood warning that covers the Los Angeles-area cities of Glendale, Pasadena and Santa Clarita has been extended until 6 p.m. local time.
A flood advisory covering all of LA County is in effect until 3 p.m. local time.
Three people have been killed by fallen trees during the monster storm slamming California.
A man in Carmichael died after a tree fell on him, a Sacramento County spokesperson said Monday.
A tree fell on a house in Boulder Creek on Sunday, killing one resident inside, according to the Santa Cruz Sheriff’s Department. A second person managed to escape the home, authorities said.
The third fatality was recorded in Yuba City. An 82-year-old man was in his backyard on Sunday when he was killed by a falling redwood tree, Yuba City police said.
