What is one essential item that should be included in an emergency kit?

Including a water supply in an emergency kit is crucial because it is fundamental for survival. In any emergency situation, access to clean drinking water can be severely limited. The human body can only survive a few days without water, depending on conditions such as heat and exertion. Having a sufficient quantity of water ensures that individuals can stay hydrated and maintain health until help arrives or until it's safe to return home.

While a first aid kit, flashlight, and map of the area are also important items to have in an emergency kit, they are secondary to the need for water. First aid kits provide medical assistance, flashlights help with visibility in dark conditions, and maps can aid in navigation during evacuations or locating resources; however, without water, survival becomes a pressing issue much more quickly. Thus, water supply stands out as a fundamental and essential necessity.