Check this out: https://www.accuweather.com/en/weath...d-sun/70001888

Looks like blood flow is the biggest one.

The "not to overheat one" is probably the sweating thing the article talked about. Sounds really bad. But if you're in a high-temperature climate, I don't know what to do about that. Ask your pharmacist? Maybe they have suggestions on what you could do about that.