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

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 ...

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

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

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.