Only 9.5 percent of the Bay Area's undocumented immigrants live in San Francisco. Many more live in Santa Clara and Alameda ...

Coastal California's Mediterranean climate is one of the most pleasant in the U.S., according to an index developed by a Bay Area meteorologist.

A form of harmful air pollution that often can't be plainly observed is now being tracked with a groundbreaking new tool developed by scientists that allows residents to see where it's coming from.

Elected officials and community members rallied on the steps of San Francisco City Hall on Tuesday in support of a resolution to endorse California's Proposition 50, which would temporarily redraw the ...