jamesdak 

Yep, gotta get out early and pump those electrolytes. I had my only heat exhaustion event about 4 years ago and since then it's harder to tolerate the heat. I did 60 myself yesterday and the temps were close to 100 for the final 15. I altered my route and backed off my effort to finish. I also screwed up and didn't bring more powder for the water bottles when I filled back up around mile 45. Heading out in a few minutes for another 50 miler and this time you better believe I'm taking more powder in a bag with me. I'm also heading out about an hour earlier than I have the rest of this week. If you feel really hot, quit! Don't risk a heat injury.