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.

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.

The potential for flooding remains high because parts of the ground remain heavily saturated. Weather officials warn that rainfall will quickly turn into runoff.

California is facing another day of heavy rain and risks of flash floods, prompting Los Angeles County to extend evacuation orders as officials warn about the dangers for road travel in this busy holiday period.

Officials in Los Angeles and surrounding counties warned that the giant holiday storm could trigger "widespread flash flooding."

Gavin Newsom declared a state of emergency on Wednesday as heavy rain, gusty winds and flooding prompted evacuations across multiple counties including Los Angeles. The National Weather Service (NWS) also issued warnings for winter storms,

Heavy rain dropped visibility for drivers early Wednesday in Orange County, California, as a powerful storm with the potential for life-threatening flash flooding moved onshore.

This year is expected to be the busiest on record for holiday travel, but rough weather can make getting to your Christmas destination even harder.As a life-threatening storm heads to California, here's a look at the Christmas week weather forecast:TuesdaySnow is falling in the Northeast on Tuesday.