The new U.S. Drought Monitor shows expansion of abnormally dry conditions in parts of the state. The outlook calling for ...

Water treatment is expensive. It uses a lot of energy and produces its own waste that gets disposed of at a hefty price.

Everyone knows what a river is, but do you know about the concept of an atmospheric river? The majority of water vapor ...

Carbon stored in landscapes for thousands of years is leaching back into the atmosphere via rivers, and human activity may be ...

Big Bear Valley eaglet Sunny left the nest for the first time on Monday, marking a bittersweet milestone for the California ...

This story appears in the spring 2025 issue of UC San Diego Magazine as “Taking Flight.” ...

The 120-mile Tijuana River flows from Baja California into the United States and discharges millions of gallons of wastewater ...

The 120-mile Tijuana River flows from Baja California into the United States and discharges millions of gallons of wastewater ...

Editor's note: This page reflects news from Wednesday, Feb. 12. For the latest updates on the atmospheric river in California, read USA TODAY's coverage for Thursday, Feb. 13. SAN DIEGO ...

Another atmospheric river is expected to bring heavy rain to most parts of California this week, raising concerns over flooding on the heels of an earlier system that broke daily rainfall records ...

A major atmospheric river storm — strong enough to potentially rival some of the extreme storms that have walloped Southern California in recent winters — is barreling toward the coast ...

Rainfall rates could reach more than 1 inch per hour on Tuesday. An atmospheric river is pounding Northern California with heavy rain and the threat of flooding before heading to Southern California.