A disastrous debris flow in 1969 killed 100 people after a 20-foot wave of mud rushed through Azusa. In 1994 a man and his 9-year-old son were killed during a flash flood in a park in Sierra Madre ...

As an intense storm moved through Southern California, a debris flow sent mud down Mulholland Drive in Hollywood Hills -- leading to a full closure of the roadway Thursday evening, authorities said.

SUSTEN, Switzerland – A recent massive debris flow thundered down a Swiss mountain channel, creating a roaring sound as the wall of water, rocks and mud shook. Local resident Pierre-Emmanuel ...

As an intense storm moved through Southern California, a debris flow sent mud down Mulholland Drive in Hollywood Hills -- leading to a full closure of the roadway Thursday evening, authorities said.