The Red Cross recommends that all emergency kits include enough water for at least three days, with a minimum of one gallon per person per day.
Other suggested items include non-perishable food, a flashlight, a weather radio, a first-aid kit, medications, copies of important documents, cash, an emergency blanket, and a map of the area.
Jarrod Murrieta, head of claims catastrophe response at Farmers Insurance, told Business Insider that he also recommends buying a filtration device that can remove bacteria and parasites from water.