Living in AZ it’s not uncommon to have runs of 43ºC for weeks on end. Oh, and there’s not much water. The Hohokam people brought water in by digging canals by h

Living in AZ it’s not uncommon to have runs of 43ºC for weeks on end. Oh, and there’s not much water. The Hohokam people brought water in by digging canals by hand 600 years ago. Now >5 million people live in the Phoenix area and put up with this heat every summer - lots of retirees to, not just healthy young people. Does construction, sports, or other outdoor activity stop during the summer? No. More might move to early in the morning or later at night, but last summer I regularly ran 5K twice a week when it was between 35-38ºC. California is taking the bulk of the water we naturally have by river, and Saudi Arabia is taking a significant amount of our groundwater (by alfalfa farming), and we’ve not started wars with either. On the other hand we have a lot of sun and we’re able to offset >100% of our cooling cost with solar energy (amortized over the year, but also at any point in time if our installer hadn’t undersized our inverter). None of that would have been possible 40 years ago, but buildings are being retrofit every day here. All that to say, people will adapt. Some will migrate. Some area may become more habitable, some less.