Hey George;
Heat or cold is a relative thing... much depending upon what one has grown accustomed to. Back in1957 I was stationed for a time at Ft Sam Houston in San Antonio. I had a friend who lived in Robert Lee and I used to travel home with him on some weekends. I was accustomed by then to Ft Hood and Ft Sam temps..
I can recall attending a ranch auction there one day when it was about 40 degrees..I had a light jacket and just about froze to death. Later, accustomed to back home temps, working in 40 degree temps was just about "shirtsleeve" weather.. When working REAL hard, I have worked at single digits in a sweat shirt.
Just a matter of growing accustomed to it.. but surely you guys can handle heat better than we northerners.