A sports drink or just upping your intake of salt can help when playing in hotter conditions. I play mostly in Southern California and I really feel it when I'm playing in humid parts of the country. My body is really stressed dealing with the humidity.
Make certain to be pre-hydrated. Take more towels to dry off, it really will help with cooling. Use shade to cool down. Also, I suggest using a towel dipped in ice water. It takes some time to acclimatize to much hotter weather.