The heat wave baking large swaths of California is driven by a large ridge of high pressure building over the Great Basin. ... What’s causing it, and areas seeing excessive heat warning.

The National Weather Service has extended an Excessive Heat Warning and Heat Advisory for California's interior and Sierra Nevada mountains until the evening of Friday, July 12.

Californians aren’t being spared from the heat this week despite fall approaching. Parts of Southern California are under an excessive heat warning Tuesday as a heat wave brings rising ...

Since the beginning of the month, Southern California has been inundated with excessive heat warnings. The Department of Public Health recommends taking precautions to avoid heat-related illnesses ...

Each local National Weather Service office issues 3 different heat alerts to classify the appropriate level of risk posed by ...

Excessive heat warning in effect for 36 million, ... Many areas in Northern California surpassed 110 degrees (43.3 C), with the city of Redding topping out at a record 119 (48.3 C).

The National Weather Service has extended an Excessive Heat Warning and Heat Advisory for California’s interior and Sierra Nevada mountains until the evening of Friday, July 12.

According to Pacific Gas & Electric, it’s better to turn off your AC unit if you will be away from home for more than four ...

The heat has not been limited to the Southwest and California. Dozens of Colorado cities, including Denver, have set or tied all-time October temperature records since Tuesday.