At least for me, heat really diminishes my appetite. I have to make myself eat. But not only do we get a significant amount of water from our food, a full stomache aids in water absorbsion and retention. Even though I don't feel like eating it, those high fat and high salt foods like fatback and bacon and sardines stay with you. If you find yourself not feeling well in the heat, it may not simply be an issue of not taking in enough liquid, but of taking in enough solid food, too.
Pine River Boys, Co I, 7th Wisconsin
"We're... Christians, what read the Bible and foller what it says about lovin' your enemies and carin' for them what despitefully use you -- that is, after you've downed 'em good and hard."
-Si Klegg and His Pard Shorty