California heat could threaten long-standing temperature records. How long will warm weather last?This week, state officials launched a new tool that ranks heat wave severity and predicts impacts from ...

Meteorologists are projecting high temperatures in Southern California this week, with the heat predicted to top 100 degrees in the San Fernando Valley.

Extreme heat significantly increased the chance of heat-related illnesses across three states in the U.S. Southwest on ...

A map shows areas in California where temperatures are expected to surpass 100 this week. There has been an early-season heat wave in Southern and Central California. On Monday, people in four states ...

CalHeatScore, in the works for years, is designed to help officials and residents better anticipate the risks of heat-related ...

Good Morning. Today is the final day of our current heat wave. We start the morning off with lots of Coastal cloud cover and ...

The pull of the foul air to Northern California was significant enough that the Bay Area Air District issued an air quality ...