Particularly warm days, which can arise during the dog days of summer, can be both uncomfortable and unhealthy. Such days also can prove deadly. Despite that threat, the Centers for Disease Control and Prevention notes that heat-related illnesses are preventable. Harmful outcomes also are preventable when people learn to distinguish between heat-related illnesses. Heat stroke and heat exhaustion are easily confused, but the two conditions produce noticeably different symptoms. Recognizing this can help anyone stay healthy or help someone in need this summer.

Heat stroke symptoms

  • Elevated body temperature, typically 103oF or 104oF or higher
  • Hot, red, dry, or damp skin
  • Fast, strong pulse
  • Headache
  • Dizziness
  • Nausea
  • Confusion
  • Loss of consciousness

Heat exhaustion symptoms

  • Heavy sweating
  • Cold, pale, and clammy skin
  • Fast, weak pulse
  • Nausea or vomiting
  • Muscle cramps
  • Feelings of tiredness or weakness
  • Dizziness
  • Headache
  • Fainting

Anyone experiencing these or other abnormal symptoms on hot days is urged to immediately move to a cool place and seek medical help. The CDC notes that heat stroke is a medical emergency, so individuals who suspect they or someone in their presence is experiencing heat stroke should call 911 immediately. If heat exhaustion is suspected, seek immediate medical help if a person is vomiting or experiencing symptoms that are worsening. More information about heat-related illnesses is available at cdc.gov.