I don't have to deal with that kind of heat at home, but I managed to survive day after day of 100+ degree (Fahrenheit - 38 degrees Celcius) temperatures during my cross-country tour back in 2002. The very hot temps followed me across the mid-west, starting in Ohio, and continuing through Kansas. Looking back at my journal, the stretch through Kansas was the worst from a heat standpoint.

I can't tell you exactly how much liquid I went through per hour because I didn't track my time. But when I look back at my journal, my ride lengths ranged from 44 to 73 miles. Assuming a 12 miles per hour pace - which is pretty normal for me when I'm touring and hauling a load, I'll assume I was on the road between 3 1/2 and 6 hours. I usually went through at least a full 2-liter Camelbak of water - more on hot days - and 6 to 10 water bottles of Gatorade (at .62 liters per bottle). Based on that, on a shorter ride I probably went through 4+ liters of liquid, and on a longer ride 8 liters.

So on the long days I was drinking just over a liter an hour. Was that enough? Well, it kept me going, and I don't believe I was ever dehydrated.

Hope that helps as a sanity check!

--- Denise