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

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

The National Weather Service Phoenix Office issued an Excessive Heat Warning that has now been extended through the weekend ...

On Sunday, the forecast high is 109. Our record for that date is 105 set in 1917. If we break that record, Phoenix will experience a 100-year heat wave.

Moving into the second week of October, the eastern half of Canada can expect some brisker fall air to break down from the ...

PHOENIX - More record-breaking temps were felt on Wednesday as an Excessive Heat Warning was extended through the weekend.

The month kicked off with triple-digit temperatures in many parts of the state, with millions of Californians under heat ...

The start of October is bringing little relief to parts of the western United States, where 36 million people are under heat ...

Temperatures could top out at 112 degrees through Oct. 4, causing the National Weather Service to put in place an excessive ...

Phoenix faces a week of soaring triple-digit temperatures with little relief from light winds, per the National Weather ...

Phoenix Mayor Kate Gallego sees plans to further local climate action as important to her reelection campaign.

Phoenix is in the throes of an unprecedented heat wave expected to last at least until the end of the week. Reality check: ...