I'm torn on summer ones. I'm a heat casualty waiting to happen.
Flashback to running in the heat in a 10K in Glenwood, Minnesota. Early season run but insanely hot. No one was heat acclimated yet. It's the only time in like 50 races that I ever slowed to a walk for a couple minutes cause I was worried I was overheating.
Was running with wife half of two ISU friends. We ran together early and then slip to run our own paces. Was waiting at the end of the race and friend never showed. Started asking people if they had seen a blonde gal wearing pink running shorts and singlet and someone said "Oh, I saw her. She didn't feel good and the ambulance picked her up." Yikes, off to the ER in Glenwood (hubby had not come to the race).
Got to ER and she is packed in ice and getting fluids and was loopy as hell (totes convinced she was dying and was telling me what to tell her husband, weird). It was like, I imagine, trying to talk to someone who was on a bad drug trip. After her temp was down and electrolytes a-okay they let her leave with me but cautioned she might be a little "off" the rest of the evening. She had a heat stroke before running but had never shared that info with me.
Scary at the time. Respect da heat.