FOOD & NUTRITION: Depending on the conditions of your environment and level of activity, an individual can survive about three weeks without food. In extreme cold the lack of food can be dangerous, and in other situations, (like gradual dehydration), hunger can bring about many consequences long before it causes death. These problems can include irritability and low morale, weakness, loss of mental clarity, poor judgment, weakened immune system, and increased difficulty maintaining body temperature.
SANITATION & HYGIENE: During periods of emergency or disaster, sanitation levels can deteriorate rapidly and disease can spread and even cause death in a matter of days. Maintaining good hygiene will prevent disease and illness from spreading. You will need a way to use the bathroom, a way to keep your living environment clean, and a way to keep your hands, mouth, and body clean