I live in the UK, but our summers are getting hotter, and I’m struggling with profuse sweating and mild dehydration.

If you are or were a student in Australia, Mexico, southern USA, Spain, Portugal, Greece, South Africa, or any other hot parts of the world, how do/did you stay cool during the day?

Note: I am familiar with the idea of a siesta; this is not an option.

If the solution is clothing, I don’t really care about gendered clothing. If it fits and looks good, it’s fine.

Thanks!

EDIT: For context, I am a student who is specifically having trouble during the school day, so AC systems and curtains aren’t viable either. It’s really clothing and strategy that I need to think about.