What happens to a person if he loses too much water?

If a person loses too much water, they can become dehydrated, leading to symptoms such as thirst, dry mouth, fatigue, and dizziness. Severe dehydration can cause more serious complications, including confusion, rapid heart rate, and even organ failure. Without prompt rehydration, especially in extreme cases, it can be life-threatening. Maintaining proper hydration is essential for overall health and bodily functions.