Over a month's worth of rain is expected in a few days across parts of Southern California, forecasters warned.

Three people are dead after storms and flash flooding in California over the Christmas holiday, and more are expected to disrupt flights this weekend.

As a record-breaking Christmas storm wraps up across Southern California, sunny skies are in store for the weekend before rain returns on New Year’s Day. The storm prompted the wettest Christmas Eve-Christmas Day recorded for downtown Los Angeles in 54 years, the National Weather Service said, with the area catching 2.79 inches.

Torrential rains inundated the California coast through Christmas, sparking numerous flash flood warnings, turning roads into rivers and sending debris cascading down hillsides.

Forecasts have solidified as Southern California braces for a widespread storm that will bring heavy rain to the region during the Christmas holiday. The National Weather Service predicts between 3 to 6 inches of rain in the coastal and valley areas, and 5 to 11 inches in the foothills and mountains.

The Christmas rain storm expected to washout California over the next few days is already rearing it’s ugly head — as a debris flow ripped through the mountain town of Wrightwood in San Bernardino County early Wednesday.

The National Weather Service (NWS) issued "life-threatening" flash flood warnings for parts of Southern California. Follow Newsweek live.