This is where the required amount of food is determined. We measure the available energy in kilocalories (kcal). A minimum daily requirement of 1,600kcal per person is assumed.
Do you have access to a body of water - should the water supply stop working? If so, a water filter might be useful. If not, it is advisable to store a supply of water.
Do you need cooking facilities, a source of information or lighting equipment in the event of a power outage?
Hygiene is important for maintaining health and poses a special challenge in the event of an emergency.