One of the largest active volcanoes has been rocked by a series of earthquakes, putting experts on high alert and prompting them to install more monitors around it.

Crandell described a massive lahar, known as the Electron Mudflow, that had formed about 500 years ago near an unstable region on Mount Rainier's western flank. "It’s not for lack of looking ...

California (KCAL/KCBS) — Swift Water Rescue Teams helped six people from their vehicles Thursday morning after heavy rains triggered mudflow that poured onto the roadway in San Jacinto.

As a late-winter storm brings rain to Southern California, evacuation orders and warnings have been issued in recent wildfire burn areas in Los Angeles and Orange counties. Official interactive ...