How Do You Treat Heat Exhaustion in a Survival Situation?

Recognizing Heat Exhaustion Symptoms

Heat exhaustion develops when the body loses too much water and salt through sweating. Symptoms appear gradually: heavy sweating, weakness, dizziness, nausea, and a rapid but weak pulse. The person may become lightheaded or faint. Skin remains cool and clammy despite heat exposure, distinguishing heat exhaustion from heat stroke.

Watch for changes in mental alertness—confusion or irritability indicates serious heat stress. Muscle cramps may occur due to electrolyte depletion. Children and elderly individuals are at higher risk. Some people with heat exhaustion continue activity without recognizing symptoms, potentially progressing to dangerous heat stroke.

Immediate Treatment Protocol

Move the affected person to shade immediately. Have them lie down with legs elevated slightly to improve blood flow to the brain. Remove excess clothing to allow heat loss through skin. Apply cool water to skin—use evaporative cooling by splashing water and fanning. If water is unavailable, use evaporating urine or other liquids.

Give the person small, frequent sips of water mixed with salt if available (about 1 teaspoon salt per liter) to replace lost electrolytes. Avoid ice water, which can cause cramping. Monitor closely—if symptoms don’t improve within 30 minutes, treat as heat stroke with aggressive cooling.

Recovery and Prevention

After recovery, rest completely in shade for several hours. Continue hydrating regularly over the next hours. Avoid returning to activity for at least 24 hours—the body remains sensitive to heat for extended periods after heat exhaustion.

Prevention requires constant vigilance: drink water regularly before thirst develops, take frequent rest breaks in shade, and avoid peak sun hours. Acclimatize slowly over several days—don’t attempt full exertion on the first day in hot conditions. Monitor group members for early symptoms, as heat stress impairs judgment.