Heat Exhaustion and Dehydration

During Utah’s hot summer months, staying hydrated is critical to avoid dehydration, heat exhaustion, and potentially life-threatening heat stroke.

Dehydration vs. Heat Exhaustion

Although related, dehydration and heat exhaustion are not the same:

Dehydration occurs when your body lacks enough fluids, often from not drinking water, excessive sweating, vomiting, or diarrhea.
Heat exhaustion results from prolonged exposure to high temperatures combined with physical activity. Dehydration can make heat exhaustion worse.

Recognizing the difference—and knowing the symptoms—helps ensure quick, effective treatment.

Symptoms

Dehydration: Dry mouth, dark urine, headache, dizziness, fatigue, and intense thirst.
Heat Exhaustion: Heavy sweating, muscle cramps, rapid pulse, nausea, fainting, or confusion.

Both require immediate cooling and hydration to prevent progression to heat stroke.

Dehydration Headaches

A dehydration headache often feels like a dull, throbbing pain on the sides or front of the head. It may worsen with movement or bright light. Drinking water and resting in a cool place usually helps, but persistent symptoms require medical attention.