Man, summers must have been fun back then. I live in North Texas now, and can't imagine life without it.
When I was an Army brat in Okinawa in the sixties, we lived without a/c for a time. It was freaking brutally hot. When Dad finally got us a proper house on base, we felt household a/c for the first time in our lives.
After moving back stateside, I didn't have a/c again until I was in my forties.
I think its state law now that any rental home/apt must have air conditioning