Originally Posted by
chasm54
But last year in Tanzania at 47C/116F in direct sun I found that I could barely drink faster than I could sweat. On one 50-mile ride I drank seven litres of water - that's over 1.5 US gallons - and couldn't pee for several hours after the finish. Scary.
For me, the key to handling the hot rides is to drink significantly before, and then early on in the ride. If you get behind the hydration curve, you're toast. You'll never catch back up. Now that it has cooled off, I can just 'drink when thirsty'.