Water weight

I live in PHX. I always carried a BOB for years in the Midwest, and managed to keep the weight manageable. The heat the past few years has gotten a little ridiculous with the heat. For water, I have been rotating the "Capri Sun" type water packs. Individually, great size and weight. In piles, a ton. Anyone here out west have a suggestion? I travel a bit, so I want to be prepared. Hey, anyone want to pitch in and find a patent for powdered water? Lol