Dehydration occurs when the body loses more fluid than it takes in, disrupting metabolic processes and normal body functions. Lack of sufficient fluid intake during strenuous outdoor activities can result in dehydration. Thirst isn’t always a reliable early indicator of the body’s need for water. Many people don’t feel thirsty until they’re already dehydrated, underscoring the importance of increased water intake during hot weather.
Dehydration can lead to serious complications, including: