We are in an annoying heat wave for weeks. Was wondering what effects heat has on PD? I was out in the heat for a very short time it was over 100 degrees F. When I went into air-conditioning building, I could not cool down. I tried Ice inside my scarf everything, but just continued to sweat for more then an hour until we had to go home with our ac in our car full blast. That was Friday and today is Sunday. I am wiped out from that weird episode.