Store at least one gallon of water per person per day for three days, for drinking and sanitation. A normally active person needs about three-quarters of a gallon of fluid daily, from water and other beverages. However, individual needs vary, depending on age, health, physical condition, activity, diet, and climate.

Take the following into account:

  • Children, nursing mothers, and sick people may need more water.

  • A medical emergency might require additional water.

  • If you live in a warm-weather climate more water may be necessary. In very hot temperatures, water needs can double.