Plan outdoor visits for cooler hours, take breaks in a cool place and drink water regularly. Wear loose, light-coloured clothing and avoid strenuous exercise in the heat. Check on children, older people and people with long-term health conditions, who are at greater risk.
Headache, dizziness, nausea and heavy sweating can be signs of heat exhaustion. Stop activity, move to a cool place, remove unnecessary clothing, cool the skin with water and a fan, and drink water. Stay with the person.
Heatstroke is an emergency. Get emergency medical help immediately for confusion, a seizure or loss of consciousness, or if the person remains unwell after 30 minutes of cooling and drinking. Continue cooling while help is on its way.
Source: NHS heat exhaustion and heatstroke guidance.
Checked on 2026-11-05.