Areas charred by last month's wildfires in Southern California now face a new threat from a powerful, but fast-moving Pacific ...

Authorities say a more than 100-vehcile pileup in whiteout conditions has closed part of a major interstate along the ...

A powerful, atmospheric river-driven storm is hitting California today, bringing with it heavy rain, strong winds and feet of Sierra snow. The storm, which prompted a lengthy flood advisory for San ...

Atmospheric rivers are long and relatively narrow bands of water vapor that form over an ocean and flow through the sky, transporting much of the moisture from the tropics to northern latitudes.