A deadly avalanche near Lake Tahoe is prompting new questions about how shifting winter weather may be reshaping avalanche danger in the Sierra Nevada.

California is one of 31 states that passed laws in 2025 limiting insurance companies’ use of prior authorization to approve or deny medical treatments.

The candidates promised action as climate disasters mount across California, but were short on big ideas.

The new Stone Canyon development in El Dorado County was built with wildfire in mind. It could offer a blueprint for building — and insuring — homes in an era of megafires.

The severity of recent floods caught San Rafael by surprise, and scientists say the city must address sea level rise or it will be underwater in the coming decades.

Amongst the ponderosa pines in California’s Butte County, Maidu women light fires not to destroy but to heal — restoring an ancient garden, and themselves.

California health officials warned people to stop foraging after 24 people were sickened. Two needed liver transplants and one died.

A swarm of small earthquakes jolted San Ramon over the last month. Scientists said the earthquakes are normal and aren’t indicative of the big one.

A Stanford lab shows that when people use virtual reality to explore an unfamiliar place, it deepens their emotional connection to, and concern about, climate change impacts far from home.

A union battle between mental health workers and Kaiser exposes the current reality and future potential of AI’s role in therapy sessions.