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

With this week’s news that superstar Jack White will play the historic theater, here’s a look at some of the big names that ...

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.

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

Climate change is allowing for extreme heat to last longer into fall, as record-breaking temperatures for the month of ...

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

Palm Springs, Calif., reached 117 degrees Tuesday as a heat wave in the western United States broke hundreds of records.

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

Heat has been the leading cause of weather-related deaths in the United States for at least 30 years. A study by Penn State ...

The Phoenix Fire Department is responding to about 10 heat-related calls a day so they're deploying new tactics to help.

For decades, experts have forecasted hotter summers in Tucson and the Southwest thanks to human-caused climate change. That ...

Tuesday was first October day in Phoenix with a temperature at or above 110 degrees since records began in 1896, the National ...