Areas scarred by the Eaton Fire are at “high to very high risk” of debris flows this week. How do they happen? What is being ...

The intense rain triggered a landslide that covered everything in its path, bringing down trees and heavy boulders.

After a wildfire, the danger continues, especially during torrential rain that can set off fast-moving landslides known as ...

While leaders of the OC Transportation Authority argue it’s needed to protect the coastal rail line, city leaders say the ...

Standing near the top of a 4,000-foot ridge above Chambers Cove, geologist Jennifer Bauer turns away from the 30-degree slope we're climbing and looks out over the valley peeking through the trees ...

The rainfall was so intense that in one dramatic example, a mudslide caused an entire house to slip down a bank into the ...

A major storm is targeting California with strong winds, heavy rain and mountain snow. The heaviest rain is expected Thursday ...

This is considered a type of shallow landslide — less than 15 feet deep. Debris flow: When water rapidly flows downhill and picks up rocks, branches, sometimes even massive boulders and cars.

Southern California's strongest atmospheric river storm of the winter is arriving Thursday, and it's expected to bring ...

they found evidence of historic landslides of such volume that rocks were dragged all the way to the Pacific Ocean. Present-day ocean reefs were formed with boulders from the surrounding mountains ...