PHOENIX— A developer notified federal regulators today that it has abandoned plans for a 200-foot-tall dam along a remote, biodiverse stretch of the San Francisco River at the Arizona-New Mexico ...

A World War II seaplane was spotted flying over the San Francisco skyline and landing in the bay, marking the first leg of ...

San Francisco broke a daily record for rain that had been in place since 1887 on Tuesday, with a pounding 2.53 inches of rain falling, according to the National Weather Service. The rain was so heavy ...

The rainfall was so intense that in one dramatic example, a mudslide caused an entire house to slip down a bank into the ...

An atmospheric river gathers moisture from the tropics and moves it inland ... While these rivers help with drought, they also create flood and mudslide risks. The heaviest rain is expected in the San ...