Hi Everyone,
I hope all is going well with you and yours & that you aren’t melting in this August heat.
These are some of the most dangerous days of the year, simply due to the heat. About 237 Americans die each due to heat related illnesses. Our bodies cooling mechanisms –
internal blood circulation adjustments, sweating and evaporation are defeated by the high humidity. Though you are rapidly losing your bodies water stores, the sweat cannot evaporate fast enough to dissipate the heat in the high humidity.
To help identify the danger zone, and express how the combined temperature and humidity “feels” or effects the human body the Heat Index was developed.
Heat Index can be calculated using the simple algorithm (I have wondered what ever happened to the old word “formula”):
HI = -42.379 + 2.04901523T + 10.14333127R – 0.22475541TR – 6.83783×10 -3 T 2
– 5.481717x10 -2 R 2 + 1.22874×10 -3 T 2R + 8.5282×10 -4 TR 2 – 1.99×10 -6 T 2 R 2
Simple, no?
Or cheat and use this chart.
I picked this version because it uses the Dewpoint. Some charts use Relative Humidity, which is fine, except the humidity is constantly varying with temperature fluctuations, while the Dewpoint usually remains fairly steady.
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| Heat Index Chart (Temperature & Dewpoint) | |||||||||||||||||
Dewpoint
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