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 of heat syncope include:
- Fainting (short duration)
- Light-headedness during prolonged standing or suddenly rising from a sitting or lying position
Workers with heat syncope should:
- Sit or lie down in a cool place.
- Slowly drink water, clear juice, or a sports drink.
Heat cramps usually affect workers who sweat a lot during strenuous activity. This sweating depletes the body’s salt and moisture levels. Low salt levels in muscles cause painful cramps. Heat cramps may also be a symptom of heat exhaustion.
- Muscle cramps, pain, or spasms in the abdomen, arms, or legs
Workers with heat cramps should:
- Drink water and have a snack and/or carbohydrate-electrolyte replacement liquid (e.g., sports drinks) every 15 to 20 minutes.
- Avoid salt tablets.
- Get medical help if the worker has heart problems, is on a low sodium diet, or if cramps do not subside within 1 hour.