An atmospheric river was set to begin pummeling Southern California with heavy rain on Thursday, prompting evacuations and ...

Atmospheric rivers are long and relatively narrow bands of water vapor that form over an ocean and flow through the sky, ...

An atmospheric river slammed into the Golden State overnight and is causing dangerous conditions across the entire region.

Thursday’s storms followed two days of heavy snow and freezing rain in a swath of the eastern U.S. stretching from Kentucky ...