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Heat Advisory Defined

December 3, 2007

By WeatherBug Sr. Meteorologist, Ryan Towell

Exclusive WeatherBug Video on Extreme Heat

A Heat Advisory is issued when the forecast calls for a heat index temperatures of at least 105 degrees but less than 115 degrees for less than 3 hours per day or overnight low temperatures above 80 degrees for 2 consecutive days.

An Excessive Heat Watch is issued when the forecast calls for at least 2 consecutive days of heat index temperatures of at least 105 degrees during the day combined with overnight low temperatures of 80 degrees or higher.

An Excessive Heat Warning is issued within 12 hours of the onset of heat index temperatures of at least 105 degrees for more than 3 hours per day for 2 consecutive days or more than 115 degrees for any period of time.

Summertime heat and humidity can be not only uncomfortable but also deadly. Knowing the symptoms of heat exhaustion and stroke can make the difference between life and death. If left unchecked, the cramps, headache, dizziness and nausea associated with heat exhaustion could progress into vomiting, a rapid pulse, unconsciousness and shallow breathing associated with a heat stroke.

Beat the heat by:

  • Drinking plenty of non-alcoholic fluids.
  • Wearing light-colored, loose-fitting clothing.
  • Staying out of the sun.
  • Staying in air-conditioning if possible (i.e. a mall)
  • Avoiding strenuous outdoor activity
  • Also, keep a close eye on children, elderly and pets.

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Source: National Weather Service

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