I don’t know how southern riders deal with high humidity the whole summer. I’m in N Michigan where our summer temps are often 90 or above. I can deal with the heat but it’s that 95% humidity that puts me out of the ride. Recently I was on an evening 16mi brisk ride with some hils but not bad, and speeds in the 16-22 range with no coasting. Temps were 75f and that last 3 miles put me in slowdown mode (12-13mph) and even with the 24oz water bottle empty at the finish line. Pulse was up, no cramping but the overheating was doing a number on me. I can ride hot temps but if that humidity rises about 85 I am either riding more slowly, pacing even the short rides (less than 30 miles) and carrying water/electolites beyond the norm. Humidity can put you down.