A triple-digit heat wave will arrive in Southern California on Wednesday, affecting inland communities, increasing health concerns. A KCAL News Next Weather Alert is in effect through Friday for the ...

The Concord Fault, which runs through Bay Area neighborhoods in Concord and Walnut Creek is in a different location than previously understood. It could produce a major earthquake in the Bay Area.

Nearly a century ago, L.A. County suffered the deadliest dam failure in U.S. history. Design flaws caused the St. Francis Dam ...