Yes, that's true, lack of drinking water can also be fatal.
The effect of drinking deficiencies greatly affects us. Starting from impaired kidney function, fatigue, digestive problems, hallucinations, and many others.
Because basically the body consists of 80 % water in infants, and 60 % in adults. This also proves that the body does need water every day. We have to consume at least 8 glasses a day, with a size of 200 ml.