Don't ration water in hot weather. When you are thirsty, drink. Conserve water as best as possible and look for more. In the summer, ground temperatures can be 30 degrees hotter than the surrounding air temperature, so, when resting, sit at least 12 inches above the ground on a stool or a branch. Stay in the shade and wear clothing, including shirt, hat and sunglasses.
Clothing helps ration sweat by slowing evaporation and prolonging the cooling effect.
Travel at night or early in the day if possible. Water sources can be located at the base of rock cliffs or in the gravel wash from mountain valleys, especially after a recent rain. Water may be found by digging three to six feet at the outside edge of a sharp bend in a dry stream bed. If wet sand is found, dig down into it to find seeping water. Animal paths and flocks of birds also may lead you to water.