The sun sets behind power lines as people row on Tempe Town Lake during a record heat wave in Tempe, Arizona on July 18, 2023. Swaths of the United States home to more than 80 million people were under heat warnings or advisories, as relentless, record-breaking temperatures continued to bake western and southern states. In Arizona, state capital Phoenix recorded its 17th straight day above 109 degrees Fahrenheit (43 degrees Celsius), as temperatures hit 113F (45C) Sunday afternoon. (Photo by Patrick T. Fallon / AFP) (Photo by PATRICK T. FALLON/AFP via Getty Images)
The sun sets behind power lines as people row on Tempe Town Lake during a record heat wave in Tempe, Arizona on July 18, 2023. Swaths of the United States home to more than 80 million people were under heat warnings or advisories, as relentless, record-breaking temperatures continued to bake western and southern states. In Arizona, state capital Phoenix recorded its 17th straight day above 109 degrees Fahrenheit (43 degrees Celsius), as temperatures hit 113F (45C) Sunday afternoon. (Photo by Patrick T. Fallon / AFP) (Photo by PATRICK T. FALLON/AFP via Getty Images)