Severe rainfall fell across California, leaving more than 500,000 residents and businesses out of power.

The rain started on Feb. 4, and lasted through Feb. 5.

According to USA Today, 48-hour totals were as high as 14 inches of rain in some parts of California.

The flooding, caused by an atmospheric river, the equivalent of a river in the sky that carries significant water vapor, has resulted in four reported deaths so far.

Gov. Gavin Newsom declared a state of emergency due to the storm.