Took Thing2 to a Ren Faire. Originally we were going to meet w/a friend from work but they had a conflict so it was just us. Took a shuttle from parking to the faire, no worries. Started walking....
......
An hour or so in, I started to feel the heat. I got four cold waters and a pickle and found a place to sit. Strangers were asking me if I was ok, and one of them insisted I take and keep a freezy block to cool my wrists and back of my neck. I sent Thing2 to do archery while I tried to get it together, and eventually I did, but DAMN. It took almost an hour to get back to a point where I could walk around. Slowly. I did manage to get some food in me, too, but just a little.
I wasn't wearing cold-weather garb; a linen shirt and coat, thin and breathing. I had a hat on for sun protection. I'd been hydrating. I think it was the new Rx the doc has me on; I experienced some 'heat waves' on the drive up.