You can build ventilation or even just building houses with basements would help a bunch. The temperature underground is a lot more cool and steady and would he

You can build ventilation or even just building houses with basements would help a bunch. The temperature underground is a lot more cool and steady and would help you escape the heat. There is a town in Australia that does exactly this because it's so friggin hot: https://en.m.wikipedia.org/wiki/Coober_Pedy https://en.m.wikipedia.org/wiki/Coober_Pedy