Signs and symptoms of heat exhaustion may develop suddenly or over time, especially with prolonged periods of exercise. Possible heat exhaustion signs and symptoms include:  Cool, moist skin with goose bumps when in the heat Heavy sweating Faintness Dizziness Fatigue Weak, rapid pulse Low blood pressure upon standing Muscle cramps Nausea Headache 
signs symptoms heat exhaustion may develop suddenly time  especially prolonged periods exercise  possible heat exhaustion signs symptoms include:  cool  moist skin goose bumps heat heavy sweating faintness dizziness fatigue weak  rapid pulse low blood pressure standing muscle cramps nausea headache 
heat exhaustion