How do rivers choose their paths? Why do some rivers form single channels, while others divide into many threads? The questions may sound simple, but they are plagued by dynamic and complex forces ...

Atmospheric rivers get talked about a lot during winter in California, and for good reason. The invisible rivers in the sky play a significant role in how much rain the state receives and can ...

Atmospheric rivers get talked about a lot during winter in California -- and for good reason. The invisible rivers in the sky play a significant role in how much rain the state receives and can ...

The second atmospheric river to hit the West Coast in as many weeks has stalled over Southern California, dumping more than 9 inches of rain over 24 hours in some areas near Los Angeles. Streets are ...

A series of powerful storms is bringing flooding, damaging winds and mudslides to areas throughout California, leaving tens of thousands of people without power. The National Weather Service warned of ...

California's historic severe drought, which is now entering its third year, is the latest dry spell to plague the nation's most populous state. But this week, a parched California is finally seeing ...