The San Jacinto Tunnel is a 13-mile-long, concrete-lined water tunnel built between 1933 and 1939, carrying Colorado River ...

Staffing at NOAA's Great Lakes Environmental Research Laboratory was already reduced by more than one-third in 2025.

Just outside Dunsmuir, Mossbrae Falls cascades down mossy cliffs in ethereal curtains of mist, a natural wonder that should ...

Marin County’s water supply could get a healthy boost during wet years if a pipeline project initiated this week by the Marin Municipal Water District ...

Coast Guard rescue missions failing after running into unexpected currents. Surprise atmospheric river storms flooding downtown San Francisco. Seafood contaminated by unseen algal blooms. California ...

A slow spring storm is headed for California this weekend, but it’s missing one key ingredient that typically drives the state’s most intense weather events: the jet stream. Instead, this weekend’s ...

Tuesday is Earth Day, and it is happening on a year the earth could use a day off. While lawsuits pour into courts over the Trump administration's cancelation of funds for climate-directed projects ...