I lived on the Gulf Coast of Mississippi for 10 years or so. When I first moved there, after a lifetime in the northeast, (N.Y. and Rhode Island) I thought I would die of the oppressive heat and humidity which were 93 degrees F and 93% humidity day in and day out. I began to get used to it after a year or two and reached the point where I could play tennis all afternoon long. The trick for me was to drink plenty of water, about one liter per hour which poured right out. In the mean time, friends who were born and raised in that environment would barely produce bit of moisture on their brow while I was drenched. If I played a tournament, an event lasting the entire week-end, I drank plenty of water even the day before the first match. One can do the best one can to keep cool but there is no substitute for acclimation. Glad it worked out well for you.