On Wednesday, about 39 million people in the region were under heat alerts, according to the National Weather Service.

More than 200 October record highs have been set and extreme temperatures are poised to persist for several more days.

Arizona Cardinals this Sunday at 1 p.m., all but ensuring that fans and players will be out in the heat of the day.

A historic October heatwave with temperatures so extreme they’d be considered hot during the peak of summer isn’t over yet.

Human-amplified climate change is making it more likely that extreme heat lasts longer into fall, as record-breaking ...

California is set to see an unusual October heat wave with a chance of record-setting temperatures in the coming days, the ...

Unusually high temperatures forecast for the first week of October in parts of California are prompting state leaders to ...

After a brief cooling period across Southern California, an “anomalous” heat wave is set to continue this week, carrying ...

An unprecedented October heat wave has enveloped the West, with record-setting temperatures from California to Colorado.

An unusual autumn heat wave afflicts California, with elevated fire concerns that on Monday prompted some power shutoffs.

Stockton and Modesto experienced record daily highs for October 4 this year as the weather continues to be unseasonably hot.