Brooklyn, N.Y. - 1940
Medic's Bag used in Pacific Theater, WW2
So by now I have digressed with somewhat related stories to this Going True Green blog post... What Constitutes a Heatwave? But have yet to speak about what makes up a Heatwave. So let us get to it...
According to many Electrical Utilities, a heatwave is declared after three (3) days in a row with the temperature at 88 degrees Fahrenheit or above. However, there is no single rule to determine when a heatwave is occurring. Factors such as the duration of hot weather, high temperatures, and humidity levels come into play, especially for the National Weather Service (NWS) for issuing Excessive Heat Warnings. These warnings may not be linked to a heatwave, because the warning could be for only 12 hours since the evening temperatures would drop significantly to cool down the weather. Keep in mind that humidity exacerbates how hot us humans feel, and comes into play when calculating a heat index. Additional factors are stagnant air, cloud cover, and wind speeds.
Therefore, when you hear some Meteorologists, public Health official, or Reporter, stating we are in a heatwave based on a definition stating at least two days of heat in a row to mandate the heatwave, many other definitions will say three days. Additionally, what may be conducive of a heatwave for the northeast, can easily be laughable by naturally hotter climates, such as in Phoenix, Arizona.
For the most part, many now consider temperatures reaching or exceeding 90 degrees Fahrenheit for three consecutive days as a heatwave. So take your pick, but use the SEARCH box above to find and read all my GTG blogs from over the decades teaching how to save money and energy with AC units, and other actions to feel cool and make a difference.
Bill Lauto, at GoingTrueGreen.com
Environmental Scientist
International Sustainability and Energy Consultant
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