They did it mainly by being accustomed to the heat, you can get used to hotter temperatures
I recently learn that 84% of homes in the United States have some form of a/c in their homes. A few decades ago, that number used to be significantly lower. Now, nearly almost everyone in our civilization either lives in or works in an environment that has an a/c, and most people haven’t spent a significant amount of time without an a/c. That is why the common sentiment among people is that they would die without a running a/c. Isn’t it weird that after only 1 century, people literally have no idea how to function without an a/c? Nowadays, people will stay inside all day in front of a television, ipad, or book in order to fell the cool relief from the a/c. If people are forced to be outside, they are angry plus in such a few layers that you would know that they have no idea how to handle the heat, and but what happens if your a/c was to stop working? What if every one of us could no longer trade with the countries that make our a/c? What if every one of us lost the ability to use electricity? Would our nation be able to survive plus thrive without a working a/c? In order to discover how to live without an a/c, every one of us need to understand how our forefathers did it. They were able to survive without an a/c, plus so can we. They did it mainly by being accustomed to the heat, you can get used to hotter temperatures. In fact, before a/cs, people had nothing besides the heat. If you were too warm, you could transfer to the shade or swim. Those were the options! Don’t be weak.
Electric heating