Santa Barbara County Sheriff Bill Brown said the decision to evacuate nearly 10,000 people was “based on the continuing high rate of rainfall with no indication that that is going to change before nightfall.” Creeks were overflowing, and many roads were flooded, he said. 

The National Weather Service reported that at least 8 inches (20 centimeters) of rain fell over 12 hours, with several more inches predicted before the latest storm system moves through the area with roads winding through wooded hillsides with large homes.