Final answer:
Consuming excessive amounts of water without sufficient electrolytes can cause water intoxication or hyponatremia, which can be fatal. Maintaining a proper balance between water and electrolytes is crucial for health.
Step-by-step explanation:
Consuming too much water with insufficient electrolyte intakes can lead to a condition known as water intoxication or hyponatremia. This condition occurs when there is a dilution of electrolytes, specifically sodium, in the blood due to excessive water intake. Symptoms can include headaches, nausea, muscular weakness, and in severe cases, it can be fatal. It is a particular risk for individuals such as athletes who may consume large amounts of water to prevent dehydration but do not adequately replace lost electrolytes.