I've seen some amazing old buildings there and elsewhere in that general area of the world that were able to even produce ice despite this heat. Shame that these olds technologies have been passed by for tech from more humid climates.

What is the humidity like? A dry heat is different from a sauna type heat.

Is there any discussion or experimentation on moving towards subterranean housing? Sleeping in a deep basement, basically.

Don't know about Sindh, but Babur used underground housing in Delhi around 1500 (and IIRC hated the hot weather).

Have experienced 47 degrees in Delhi, hate to think of 52.

https://en.wikipedia.org/wiki/Babur

That seems like a good idea, but none of my family's houses had any such livable basements.