Reminds me of another India beat-the-heat tech that I read was widespread there for centuries.
Those who've ever been in a root cellar or basement are excused. You make a hole in the ground, then go down in it. Underground temperatures world-wide hover around 50-60 degrees all year long.
Make a BIG hole in the ground, and build stairs that people can use to go down into it. Heat rises, so not a problem.