I grew up without AC. Now it wasn’t as hot as it is now.
But things you may not be aware you can do.

Take cold showers.

Yeah. That works.

Take a shower and then stand there naked, wet, with a fan on. You will be shivering in no time.

If you have long hair like I did. I would often just hold my head under the tub faucet. Soak my hair. And face. And that would cool me off.

I sometimes did this multiple times a day when it was crazy hot.

You all have access to water. Use it. It’s not just for drinking.

There was a few instances where I filled the tub and just had a cold bath while reading a book or something.

The water will stay mostly cool all day. No need to drain each time you get in. Just don’t pee in it.