Millions of people in California are facing potentially life-threatening flooding as a storm brings torrential rain to the state.
About half a year's worth of rain could fall in Los Angeles and its surrounding areas in just 24 hours on Monday.
The "atmospheric rivers" causing the storms have already brought rain, wind and snow to swathes of California.
The storm killed one man in Sacramento Valley, who died on Sunday after a tree fell on him due to fierce winds.
A state of emergency has been declared in 10 of the state's counties.
Forecasters have said torrential rain is now the main risk facing California, and could cause flash flooding and mudslides. Officials have issued evacuation orders for residents in several counties, including Los Angeles and Santa Barbara.
On Monday, the Weather Prediction Service (WPC), part of the National Weather Service (NWS), issued a level four warning for rainfall in the southern parts of the state.
These warnings follow what has already been a record-setting day for the state. The NWS said that on Sunday, 4.10 inches of rainfall dropped in downtown Los Angeles, surpassing the previous record of 2.5 inches set in 1927.
Monday is expected to be worse with the NWS warning that it could be "one of the most dramatic weather days in recent memory".
The WPC said the Los Angeles Basin and surrounding areas face potentially "life-threatening" flash flooding. It said mudslides and debris flows were also a risk.
The centre added that "very heavy" snows would continue in the Sierra Nevada mountains, rendering travel "dangerous to impossible".
'Catastrophic' flooding to hit California as bad weather continues
The "atmospheric rivers" causing the storms will linger on Monday as the state is pummelled by rain, wind and snow.
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