I catered a wedding at the base of a mountain, surrounded by corn fields, it was 104 with a HI of 122, and not a lick of wind. Out of 5, I literal had to carry 2 into Er with heat stoke, other 2 had heat exhaustion pretty bad. My trick, I went to patient first saying I was dehydrated and got 3 bags of saline right before the event. They all thought I was joking when I said I was going to do that because I know how easy I sweat. During the event I had 50 flexible ice packs in a color and basically rigged a vest out of straps and changed up the ice packs every 15-20 mins. I remember dumping an ice bath on my head and within minutes all the wet was warm/hot. I clicked 27,450 steps that day. Drank over 200oz in addition to 3 saline IV bags and weight in at nights end 6 lbs less than morning. I had horrible cramps that night. I was paid very very well for that event as in thousands of dollars for 10 hours work but in hindsight The Who thing was just pure stupidity .