100 to 103 is tolerable, it's the 110-118 range that gets really rough. We had a lot more of those last year.
Also, it is said regarding locals: It is not the 110 degree days that are bothersome, it's the 95 degree nights.
On the other hand, Vegas has been insanely hot this summer - usually we are 5-10 degrees cooler than Phoenix…this summer that has flipped.
Blame it on the heat island effect….too much glass and concrete