Naysayers will say nay. The time I ran out of water was in Kansas after I stopped carrying as much, but I had come through the Anzio Borego, Southern California/Arizona and up through the four corners in late August without significant problems. It will be hot, but you already know that. A lot of people told me it was crazy, but the idea of riding a bike across the country, or just to the next town, is also crazy to a lot of people. Decide for yourself.