I would be concerned about living in southern Arizona in the summertime with an extended power outage. Without AC or big swamp coolers you’d better find some Anasazi caves. It IS very expensive to power AC with a whole house generator or huge solar bank.
I live next to the Columbia River, it can get hot here, too (120°F a few years ago), but cool downs are a half mile away. We’ve got our own problems with volcanoes and earthquakes, though (although not so much locally unless Jellystone goes off and then it’s curtains for all of us).
There is an old mission church with three foot thick stone walls that is cool year round near Tucson. We do have solar, but no backup battery (came with the house). The canal runs half a mile near our house. I can take the heat, and children are pretty acclimated. If we could even go two hours north to Flagstaff, the elevation brings the temperature down considerably.