Water eh?
The past two summers Ive formed a habit of eating an orange and/or strawberries every day on first break. Or other berries and citrus fruits. And I pound the water, with some tea at lunch. The caffeine can't be good for the heat situation but I need a kick to stay in high gear. I've also been eating more raw veggies this year which sits well on my stomach when too hot to eat other things.