Doesn’t even need to get that hot to kill especially infants and children who don’t sweat much and elderly plus health related. My daughters brought kids off the street collapsed with heat exhaustion. They would of been found dead. Then in Arizona they were giving Indians ” relocating them to clay houses with no power years back in the middle of the dessert.
Ororeef is right about keeping your freeze half Ice Cuz it flys off the shelf plus you can drink it if worse comes to worse. I told a older couple last week to keep cool rags around their necks when they had no air conditioner In Arizona it would be best to insulate the heck out of your house in hot areas. Roof especially and walls. Super insulate plus it would save a lot on power. Otherwise they might have to get camp on the river or have a generator and portable cooler.