Are you acclimated to the heat yet? I know that I'm not, and the other day when it was 100, I really struggled to get in 20 (and I'm in good cycling shape). The heat can really zap you. One thing that I've found helpful in especially hot conditions is to use endurolytes http://www.hammernutrition.com/za/HN...0047&AMI=10104
I started using them when tri training, and now I use them ALL the time in the heat. Every endurance athlete I know swears by them.
Doesn't mean I won't have trouble, but I know for certain that it helps me maintain my stamina/endurance in the heat. I take 2 an hour.

I'm not trying to push drugs here, but that's what helps me in the heat.


I think you did quite well. Really, going 56 in that heat when your longest ride has been 30 is impressive. Really.