Good advice
I'd like to add:
Didja know, the fellow who invented the heat index died a few days ago. Really? Yeah, he was only 78 but he felt like he was 105!
Seriously though, some diagnoses and kinds of medicine can affect our heat tolerance. Thyroid, high blood pressure, heart conditions, kidney issues. Especially be careful if taking any diuretic, beta blocker, etc.
Be safe and have fun.
Cliff