Phoenix was voted most "Sweatiest" city. 
Yeah, 110 degree dry heat is flippin hot and I sweat a bit but will take dry heat over a humid 90 degree anyday!
Spent some time in Dallas last August, yuck..took me an hour to dry off when I got inside and I shave my built in sweater! 
I think it was about 5yrs ago I read this in the waiting room at the Dr's office. I think it was in "Time." or one of those mags like that.
It was a list of the 100 fattest cities in the U.S. and the 100 most eating out cities in the U.S. per capita.
I live in a suburb of Nashville, about 20min south of downtown Nashville, call Murfreesboro.
My town Murfreesboro was ranked the #2 fattest city in the U.S. and the #1 eating out city per capita in the U.S.
I cannot remember how they came up with this ranking system, but from living here it sounds about right lol!