How long you can live without water
person may only survive a few days without water. But, many factors affect how much water they need, such as their activity levels and environment. For this reason, it is not possible to tell precisely how long a person can live without water. Dehydration happens quickly, causing extreme thirst, fatigue, and ultimately, organ failure and death. A person may go from feeling thirsty and slightly sluggish on the first day with no water to having organ failure by the third. Dehydration does not affect everyone in the same way. Each person will have a different tolerance level to dehydration and may be able to survive without water for longer or shorter periods than someone else. The body needs lots of water to carry out many essential functions, such as balancing the internal temperature and keeping cells alive. As a general rule of thumb, a person can survive without water for about 3 days. However, some factors, such as how much water an individual body needs, and how it uses water, ca