Heat stroke is mostly self inflicted...You think you're hot, you'll get hotter. I'm more intolerant of cold. But, cold can be mind driven. Tell yourself you're cold, you'll be cold. I tried this out a few years ago when my nutty sister in law insisted we go tour the Nascar place near her house. I wanted to go see manatees, but no, she was driving and drove us up to that stupid Nascar place. We had been in the Keys where it was warm, but it was Jan. and a front had made it through Daytona and it was misting. 40 degrees and mist, sitting in a metal seated open train car for over an hour was horrid. She had warm stuff for her and my BIL, even blankets... My husband had a hoodie and long sleeved shirts. Not knowing we were going to be sitting out in a metal seated open trailer, I just had regular stuff on. There was no way I was going to complain about the cold..SO, I sat there telling myself Im not cold, i'm not cold. Normally, I would have been in a state, that is just too cold to be sitting in the wind, mist and sitting on metal for hours.. But, I survived....