Heat syncope is a fainting (syncope) episode or dizziness that usually occurs with prolonged standing or sudden rising from a sitting or lying position. Factors that may contribute to heat syncope include dehydration and lack of acclimatization.

Symptoms
Symptoms of heat syncope include:

• Light-headedness
• Dizziness
• Fainting

First Aid Treatment
A person with heat syncope should:

• Sit or lie down in a cool place as soon as the symptoms occur
• Slowly drink water, clear juice, or a sports beverage

We also offer a free certificate of completion. To receive the certificate you must pass a 50-question test with a score of 70 or higher. Check our Basic First Aid Certificate of Completion page for more information.