Heat Exhaustion: Recognition, Immediate Treatment, and Prevention

Heat exhaustion occurs when the body loses excessive water and electrolytes through sweating, impairing temperature regulation. It is a medical emergency that can progress to heat stroke if untreated.

Signs and Symptoms

• Heavy sweating with cool, clammy skin
• Weakness, dizziness, lightheadedness
• Headache, nausea, vomiting, diarrhea
• Muscle cramps
• Rapid, weak pulse; rapid breathing
• Intense thirst
• Pale or ashen complexion

Immediate First Aid

1. Move to a cool environment (shade, air-conditioned space).
2. Lie down with legs elevated to improve venous return.
3. Remove excess clothing.
4. Cool the body: Apply cool, wet cloths; fan the skin; use ice packs at neck, axillae, groin.
5. Rehydrate: Sip cool water or electrolyte solution (e.g., sports drink) if conscious and not vomiting. Avoid alcohol/caffeine.
6. Monitor: If symptoms don't improve within 15–30 minutes, or if confusion, fainting, or seizures occur, call emergency services immediately.

Prevention Strategies

• Hydrate proactively: Drink 16–20 oz water 1–2 hours before heat exposure; 6–12 oz every 15–20 minutes during activity.
• Acclimatize: Gradually increase heat exposure over 7–14 days.
• Dress appropriately: Light-colored, loose, moisture-wicking clothing; wide-brim hat.
• Schedule wisely: Avoid peak heat (10 AM–4 PM); take frequent rest breaks in shade.
• Know your risk: Certain medications (diuretics, anticholinergics, beta-blockers) and conditions (obesity, heart disease) increase susceptibility.

Heat exhaustion is preventable. Recognize early signs and act fast to avoid life-threatening heat stroke.