It was a hot day and Thom got cooked on one of the last climbs. He does not have an efficient cooling system.

Me either! That sucks too! I live in South Carolina and I hardly ever work up a sweat -- even when I rode the 54 miles this past Sunday. I'm riding in rolling hills and going at over a 14mph average pace (I know, slow for you guys -- but okay for a newbie!). Anyway, I actually gain weight on my rides -- 4lbs last time! I guess it's from all the hydration & not sweating it off? Of course, I tinkle it all away as the day goes on but it sure is annoying.