I cut some properties on saturday and the heat index was around 101. I about fell out. I was getting stomach cramps and felt lethargic. I sweat a lot anyway so I couldn't gauge that. It started at my second stop, a trailer park with no trees and nowhere to hide from the sun. It carried on through the day. At the end of the day, all I could do was sit in the shade next to my trailer for about an hour before I could walk in to shower. I layed down after that for about an hour and seemed fine. I cut my own yard sunday and it was about as bad (breathing hot air in) except I had a getaway (a/c,Lazyboy). Saturday afternoon I was sitting there thinking I couldn't hang with this and maybe ought to rethink it. Then I thoght about what I could do to overcome some obstacles like: change diet during hot season, pick and choose better accounts, and ask the guys/gals at Lawnsite how to handle the heat.