is the most serious form of heat injury and is considered a medical emergency. It is a condition caused by your body overheating, usually as a result of prolonged exposure to or physical exertion in high temperatures. This most serious form of heat injury, heatstroke can occur if your body temperature rises to 104 F (40 C) or higher. Heatstroke requires emergency treatment.

Heat stroke symptoms include:

  • High body temperature. A body temperature of 104 F (40 C) or higher is the main sign of heat stroke.
  • Altered mental state or behavior
  • Alteration in sweating
  • Flushed skin
  • Rapid breathing
  • Racing heart rate
  • Headache


Is it a stroke? Think FAST!


Look for facial asymmetry.


Weakness or numbness of one arm.


Listen for slurred words.


If above symptoms are showing, call the emergency services or go to the nearest hospital.