Paul Haddad 
4 summers ago I got overheated (not health danger levels, but quite unpleasant) on a 30ish minute errands run. Ever since then my heat tolerance has totally reset, now anything over about mid 80s and I'm cooked. Not great while living in Texas.
Graham McIntire W5ISP@paul I was born in Plano and I’ve had the same thing happen just not for as long. I eventually reset back to Texas heat.