A powerful atmospheric river storm is pounding parts of California with torrential rain, strong winds and snow and leading to issues from San Francisco to Los Angeles, including areas recently impacted by deadly wildfires.

An atmospheric river storm is pounding parts of California with torrential rain, strong winds and snow that is leading to issues from San Francisco to Los Angeles, including areas impacted by wildfires.

A new study finds that atmospheric rivers — the heavy rain and wind events most known for dousing California and other parts of the West — have been getting bigger, wetter and more frequent in the past 45 years as the world warms.

A new study finds that atmospheric rivers — the heavy rain and wind events most known for dousing California and other parts of the West — have been getting bigger, wetter and more frequent in the past 45 years as the world warms.