Mud and debris flows closed roads and prompted evacuations in parts of Southern California recently devastated by wildfires.

In Santa Barbara, people living in at-risk areas were told to leave by 3 p.m. Wednesday. The National Weather ...

California has worked to add tools to protect against mudslides, including pinpointing hot spots, creating basins and placing nets to capture falling debris before it hits homes.

As heavy rain from a large storm subsided, officials in Southern California said rock and mudslides remain a threat.