Phoenix summer temps are normally 114, Tucson 104, and Yuma 117.
Could it be we (all ages) are in better shape and not grossly overweight BLIMPS?
C'mon, Sand Rat; lay off the cheap shots! That blubber is what makes all the difference between just shivvering, or freezing to death in those brutal Michigan winters!
It is also why they drop from heat stroke when it gets above 80.