Heat exhaustion recovery time: what to expect

Recovery depends on how much fluid and salt were lost, how long the person stayed in the heat, their age and health, and whether another illness is present. Tiredness, thirst, headache, weakness, or mild dizziness can continue after the body has cooled. Symptoms should trend toward improvement with rest; a person who is confused, collapses, has a seizure, or cannot drink may have a more serious heat illness rather than uncomplicated exhaustion.

Rest in a cool environment and replace fluids gradually with water or an oral rehydration drink if suitable for you. Eat normally when nausea settles, and avoid alcohol, strenuous exercise, and further heat exposure until you feel fully recovered. Keep track of urine colour, thirst, dizziness, and headache. Dark urine or very little urine can point to dehydration. Resume activity in short, easy periods and stop if symptoms return.

Seek emergency care for confusion, fainting, seizure, breathing trouble, chest pain, inability to swallow, or worsening rather than improving symptoms. Contact a clinician promptly when marked weakness, vomiting, dizziness, headache, or thirst persists despite cooling and drinking. Medical advice is also sensible after an episode in a child, older adult, pregnant person, or someone with a chronic condition.

Ask when you may return to work, sport, or outdoor activity, whether your medicines affect heat tolerance, how to replace fluids safely, and what warning signs should prompt reassessment.