A final round of heavy rain is drenching California Friday and threatening to bring more flooding and debris flows after a days-long deadly siege of storms.

The the region's latest atmospheric storm dumped 6 inches of rain in the Los Angeles area with up to 18 inches of rain in the mountains.

Forecasters measured 4.52 inches of rain at the Santa Barbara Airport on Christmas, beating the previous record of 2.17 inches set in 1955.

A powerful Christmas week storm is dumping rain across Southern California, putting at-risk communities on alert and prompting evacuation warnings.

Record breaking rain hit Southern California, leaving emergency crews to rush to respond to flash floods and mudflows across the region.

Officials warned that driving would remain hazardous across much of the state, with heavy rain still to fall in some places that broke records on Christmas Eve.

Towns across California have been affected by storms during Christmas week, filling homes halfway with mud, cracking highways and burying cars. The National Weather Service warned of heavy rain throughout the week due to a series of atmospheric rivers.

FOX Weather Correspondent Brandy Campbell is live from Los Angeles, California as heavy rains and floods threaten areas across Southern California.

Scientists attribute these extreme weather swings to climate change, warning of intensifying "hydroclimate whiplash" patterns globally.