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Heatstroke: Emergency Symptoms - Topic Overview

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.

After calling 911or other emergency services, begin emergency first aid treatment if emergency medical personnel (such as paramedics) are not going to arrive soon.

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WebMD Medical Reference from Healthwise

Last Updated: August 30, 2013
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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