Heat Stroke at Night: What to Know

A closed room, heavy bedding, poor ventilation, or illness can prevent the body from shedding heat during sleep. A person may wake with a severe headache, dizziness, weakness, nausea, or altered behaviour. Heat exhaustion is a less severe heat illness, but it can worsen if cooling and fluids do not help. A fever is a different process and may need separate evaluation.

Wake the person gently and check whether they can answer simple questions. Move them to a cooler area, remove excess bedding and clothing, and apply cool wet cloths while using a fan. Do not leave a confused or faint person alone. Avoid giving drinks to anyone who cannot swallow safely. Contact emergency services and mention that symptoms began during sleep or in a hot environment; IV Fluid Therapy may be needed by medical staff.

Get emergency help for confusion, collapse, seizure, severe breathlessness, inability to drink, or skin that is very hot. Do not rely on sleep as treatment or wait until morning. If symptoms are milder but continue after cooling, arrange prompt medical advice because heat illness can recur and another cause may be present.

Ask whether the room, bedding, medicines, or another illness contributed. Discuss safer sleeping conditions, warning signs to monitor, and when the person may return to exercise or outdoor heat.