Heatstroke is a medical emergency. Even with immediate treatment, it can be life-threatening or result in serious, long-term complications. After calling 911 or other emergency medical services, follow these first aid steps.
Try to reduce it to 102 °F (39 °C) or lower as soon as possible. The longer the body is at a high temperature, the more serious the illness and the more likely it is that complications will develop. Temperatures taken by mouth or in the ear are not accurate in this emergency situation
These include seizure, unconsciousness for longer than a few seconds, and moderate to severe difficulty breathing.
If the person is unconscious or does not respond to your voice or touch, be ready to start CPR.
If the person is awake and alert enough to swallow, give them plenty of cool water to drink. You may have to help. Make sure the person is sitting up enough so that they don't choke. Most people with heatstroke have an altered level of consciousness and cannot safely be given fluids to drink.
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