Map of Sierra Nevada in California showing how an atmospheric river develops. Most atmospheric rivers are weak and do not cause damage. In fact, they can provide much-needed rain or snow.

Atmospheric rivers are more common during the winter months, but officials are warning people not to let their guard down.

A salmon recovery plan released by the governor’s office committed to removing dams on California’s Eel River, Ventura River and Malibu Creek for the restoration of habitat for salmon ...