Nothing like a little whitewater rafting to take the heat out of the desert! The day after our hike, a long drive from Phoenix brought us deep into the Superstition mountains, where we paddled through Class II and III whitewater down the Salt River. Not all of Arizona is hot and arid; when the rafts pushed off, it was 43 degrees!
Without excellent communication, you won't make it through the more technical parts of the river. Even getting the raft down to the river requires good communication between the guide and the paddlers.