[solardev]

Not dismissing your overall point (it's certainly easier to just combust something for heat) but it's not strictly true that you can't cool without electricity. There are techniques both modern and ancient that can help, though sadly most structures aren't built this way:

https://en.wikipedia.org/wiki/Passive_cooling?wprov=sfla1

Where it gets really problematic is places that used to have a moderate climate (vs always having been hot) so the people and structures have no adaptations for the sudden extreme heat.

[goerz]

Yes, you can absolutely (and we will have to) mitigate hot temperatures with building design, but only up to the point where you have wet bulb temperatures >35C over several days. There are heavily populated areas that are in real danger of having something like that happening, and this is what that would look like: https://www.orbitbooks.net/orbit-excerpts/the-ministry-for-t...