As an image of “water intoxication”.
Overdose of water causes fatigue, headache, dizziness, calyx, etc. In some cases it leads to death due to hyponatremia in severe cases.
This is called “water poisoning”, and vigilance is being called for too much water drinking at the same time as measures against heat stroke at High temperature.
As a countermeasure, we should refrain from drinking water at once, it is said that it is good to drink little by little, about 200 milliliters of moisture that the human body can absorb at one time.