I was born in Houston without A/C in 1940 . My parent didn’t get it until over 20 years later.
We had no idea how miserable we were! ; )
I lived in Fresno CA without AC during the same time period, but (at least) desert air coolers worked there. Or, in a pinch, a fan blowing over a block of ice (the solution during WWII.) Houston had/has humidity which is a whole different animal!