California’s drought does not stop at the state border. Arizona is in drought, too, and has fewer reservoirs to pull from. The largest, Lake Mead, just hit a record low. Without sufficient, and safe, not sudden, rain, Arizona will have to start rationing to a far higher degree than California. One city in particular, Tuscon, relies on a diverted river. The likelihood of severe impacts is 33% by the end of 2015.