California's Central Valley—one of the nation's most critical agricultural regions and home to over 1.3 million people—is ...

Ocean acidification has crossed “planetary boundaries” in some parts of the ocean, deepening a crisis facing the planet’s ...

Marine experts say governments must protect fragile ecosystems from destructive practices such as bottom trawling and deep ...

Bay Area astronomers say a severe geomagnetic storm could cause the northern lights to appear over the Bay Area again.

The deadly, widespread flooding disaster that plunged parts of the central and southern United States underwater in early ...

Photos capture the impact of the atmospheric river that triggered mudslides and significant floods in Southern California this week. Evacuation warnings were issued for vulnerable locations ...

Photos captured the impact of the atmospheric river that triggered mudslides and significant floods in Southern California this week. Evacuation warnings were issued for vulnerable locations ...

NORTHERN CALIFORNIA — Heavy rain from a major ... in areas north of San Francisco from this season’s strongest atmospheric river — a long plume of moisture that forms over an ocean and ...