Heat Injuries

Heat injury is a broad term encompassing many different illnesses. Heat injury is also commonly referred to as heat illness or heat disorder and may be classified as exertional or nonexertional. Heat illnesses are more commonly seen in exercising individuals or in hot environmental conditions. However, it should also be recognized that a heat injury does not always occur in an exercising individual or in a hot environment. The International Classification of Diseases (ICD), which is published by the World Health Organization, lists 10 heat illnesses:

• 1.
  Heat stroke
• 2.
  Heat syncope
• 3.
  Heat cramp
• 4.
  Heat exhaustion (anhidrotic)
• 5.
  Heat exhaustion (due to salt depletion)
• 6.
  Heat exhaustion (unspecified)
• 7.
  Heat fatigue (transient)
• 8.
  Heat edema
• 9.
  Unspecified heat effects
• 10.
  Effect of heat and light (unspecified)

While the ICD lists hyponatremia under disorders of ...