I live a few hours outside Las Vegas and it's a lot more survivable than you would think given primitive technology and some knowledge.

I have one of those portable evaporative coolers and they don't need much power (50-100W). I have one and measured ~110F input and 78F on the output side using nothing more than water and a fan, pretty remarkable. The trick is staying out of direct sunlight, and the body can cool itself well with the same mechanism. Sweating is extremely effective due to the low humidity.

I mean... I need ~120 watt an hour to keep the house between 20-23 C.