Live with it and ride. I did the Gulf Coast in July in 2015 and the only thing I really did was to not use a tent, unless the mosquitoes forced me into it and I used the tent fly as my sleeping bag. I started at the sunrise or before, only because I was riding 125 miles or so each day, not because of the heat. You learn to touch it out and ride through it. Don't 'sweat' it.