Over the years, this symptom has gotten worse and worse. After reading a bit of Cheney's writing about vasoconstriction and low blood volume, I understood a bit better why I went from someone who *loved* the heat (at least in a drier climate) to someone who becomes completely incapacitated and debilitated when the temperature starts rising. Lately it's been in the nineties where I live, and my upstairs dwelling has no climate control. It has been getting up to 86 indoors, at which point I am splayed out like a corpse with three fans aimed at me and ice packs rotating strategic locations on my person. Does anyone else get this, have more info, answers, or strategies? Thank heaven the heat is less today. I feel vaguely human again.