Originally Posted by BoSoxYacht
All summer long, it's 110 +/- 5 degrees when I start my afternoon rides. At 115 degrees(in the shade) you are sweating profusely, even while resting.
I don't doubt you're sweating a ton, and losing a lot of fluid. What I do doubt, based on a lot of published literature is that you could replace that fluid at the rate of 102 ounces an hour while riding hard.