I have lived here for 41 years now. There are wet times and dry times. One thing I do know. We let more water pass through the canals every day than we use in a week. They claim drought all the time in Phoenix. But as long as the canals are running and we are letting water flow down. It will be ok. I will get really worried about drought when there is one year when they cant tube the salt river (fresh water for those who don't live in az).
Now if we can get them to stop draining the lakes so the can fix the dams i would be a happy camper. It takes a long time to recover from that.