You don't have to wander into the wilderness. Hundreds of (mostly homeless) people die of heat related causes every summer in the city, on the street.

Phoenix is a 'monument to arrogance' has been a trope on the internet for a while now and it kind of bugs me. The area that is Phoenix was founded hundreds of years ago by indigenous people who built the canal systems that the city still uses to deliver water to residents. Read about the Hohokam if you're interested.

No it's not sustainable at the scale that capitalism drives it and is definitely ass backwards to build water intensive industry like data centers and alfalfa farms there, but the desert does support life even if it's really really hot sometimes. (not responding to you here u/Assian_Candor, just using your comment to vent).