Heat Index a Government Conspiricy?

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The heat index was developed in 1978 by George Winterling as the "humiture," and was adopted by the National Weather Service a year later.[1] It is derived from work carried out by Robert G. Steadman.[2][3] Like the wind chill index, the heat index contains assumptions about the human body mass and height, clothing, amount of physical activity, thickness of blood, sunlight and ultraviolet radiation exposure, and the wind speed. Significant deviations from these will result in heat index values which do not accurately reflect the perceived temperature.[4]



Here is a formula for approximating the heat index in degrees Fahrenheit, to within ±1.3 °F. It is useful only when the temperature is at least 80 °F and the relative humidity is at least 40%.



where

HI = heat index (in degrees Fahrenheit)
T= ambient dry-bulb temperature (in degrees Fahrenheit)
R = relative humidity (in percent)










en.wikipedia.org/wiki/Heat_index