A concern I would have with high heat is dehydration.
A quick and short lived spike is more likely to cause brain damage than to dehydrate. Long term heat without proper liquid sustenance would more likely be a culprit in dehydration than a temp spike.
I may not be very smart, but what if I am?
Stinky says, "Women should be obscene but not heard." Stinky is one smart man. www.humanewatch.org