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WARNING SIGNS AND SYMPTOMS OF HEAT-RELATED ILLNESS
July 20, 2012 - cdc.gov

Muscle cramping might be the first sign of heat-related illness, and may lead to heat exhaustion or stroke. Here is how you can recognize heat exhaustion and heat stroke and what to do:

Heat Exhaustion

  • Heavy sweating
  • Weakness
  • Cold, pale, and clammy skin
  • Fast, weak pulse
  • Nausea or vomiting
  • Fainting

What You Should Do:

  • Move to a cooler location.
  • Lie down and loosen your clothing.
  • Apply cool, wet cloths to as much of your body as possible.
  • Sip water.
  • If you have vomited and it continues, seek medical attention immediately.

Heat Stroke

  • High body temperature (above 103°F)
  • Hot, red, dry or moist skin
  • Rapid and strong pulse
  • Possible unconsciousness

What You Should Do:

  • Call 911 immediately - this is a medical emergency.
  • Move the person to a cooler environment.
  • Reduce the person's body temperature with cool cloths or even a bath.
  • Do NOT give fluids.

Content source: National Center for Environmental Health