Mudslides are dangerous torrents that are usually referred to by geologists and first responders as debris flows.

An 18-foot-deep sinkhole opened up in Ontario, covering an entire intersection and forcing a major street to shut down.

The USGS has monitoring stations strategically scattered around the Bay Area in landslide-prone areas. The agency also has years of monitoring data to compare with real-time data, which helps ...

Southern California took stock on Friday of the damage from an intense bout of rain. Among the most dramatic scenes: a Fire Department vehicle that was swept to the sea.

Mudslides in Los Angeles inundated roadways and prompted evacuations orders after an atmospheric river dumped heavy rains ...

The storm prompted evacuation orders, as officials warned of flash floods in burn-scarred areas near the Eaton and Palisades ...

Debris flows brought on by the strongest atmospheric river of the season swept a car off a southern California highway and into the ocean and left roads submerged in sludge.