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May 25, 2013
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Heat Exhaustion and Heat Stroke

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Heat Exhaustion and Heat Stroke Overview

Heat exhaustion: This condition often occurs when people are exposed to high temperatures especially when combined with strenuous physical activities and humidity. Body fluids are lost through sweating, causing dehydration and overheating of the body. The person's temperature may be elevated, but not above 104 F (40 C).

Heat stroke: Heat stroke, also referred to as heatstroke or sun stroke, is a life-threatening medical condition. The body's cooling system, which is controlled by the brain, stops working and the internal body temperature rises to the point at which brain damage or damage to other internal organs may result (temperature may reach 105 F or greater [40.5 C or greater]).

The National Oceanic and Atmospheric Administration (NOAA) reported that 206 people died in 2011 as a result of extreme heat, up significantly from 138 fatalities in 2010. An average of 119 people die each year due to extreme heat conditions in the U.S. Avoid heat exhaustion by not engaging in strenuous activity in hot, humid environments; and stay hydrated as prevention is the key.

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Heat Exhaustion And Heat Stroke - Difference

The eMedicineHealth physician editors ask:

How did the doctor distinguish between heat exhaustion and heat stroke?

Heat Stroke Symptoms

Heatstroke occurs when the body fails to regulate its own temperature and body temperature continues to rise, often to 105?F (40.6?C) or higher. Signs of rapidly progressing heatstroke include:

  • Unconsciousness for longer than a few seconds.
  • Convulsion (seizure).
  • Signs of moderate to severe difficulty breathing.
  • A rectal temperature over 104?F (40?C) after exposure to a hot environment.
  • Confusion, severe restlessness, or anxiety.
  • Fast heart rate.
  • Sweating that may be heavy or may have stopped.
  • Skin that may be red, hot, and dry, even in the armpits.
  • Severe vomiting and diarrhea.

Heatstroke is a medical emergency. Even with immediate treatment, it can be life-threatening or result in serious, long-term complications. After calling or other emergency medical services, follow these first aid steps.

SOURCE:
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Read What Your Physician is Reading on Medscape

Heat Exhaustion and Heatstroke »

Heat illness is a major cause of preventable morbidity worldwide, especially in regions characterized by high ambient temperatures.

Read More on Medscape Reference »


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