Heat acclimation

So yesterday and today I got to see what it's like to run in some summer heat. This afternoon the temperature was much higher, but the humidity was less. I went out in the middle of the afternoon with the temperature at 93 F ( 33 C ), but the humidity was a modest 42 %. So believe it or not it didn't feel that bad, of course I was only running a few miles and I had made sure I was pretty well hydrated. I was sweating pretty good though by the end of the run.