This a well known fact that it is not only the air and sunshine that humans cannot live without, but you also need food and shelter for surviving on this planet.  We all know that a human can live without food for three weeks long. But living without water is something impossible.

60% of human body is made up of water and each living cell in the body needs water to keep itself functioning. Water acts as a lubricant for our joints, manages our body temperature through sweating and respiration, and flushes out the waste from the body.

The maximum amount of time that an individual can pass without water is seems to be a week. An assessment that would certainly be shorter in troublesome conditions like broiling heat. On the other hand, one week is a generous evaluation. Three to four days would be more typical.

Claude Piantadosi of Duke University told "You can go 100 hours without drinking at an average temperature outdoors. If it's cooler, you can go a little longer. If you are exposed to direct sunlight, it's less."