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Effects of the heat index (shade values):
Fatigue is possible with prolonged exposure and activity.
Continuing activity could result in heat cramps.
Heat cramps and heat exhaustion are possible. Continuing
activity could result in heat stroke.
Heat cramps and heat exhaustion are likely; heat stroke is
probable with continued activity.
4 Glossary of Terms
Accuracy is defined as the ability of a measurement to match the actual
value of the quantity being measured.
The dew point is the temperature at which a given parcel of humid air
must be cooled, at constant barometric pressure, for water vapor to
condense into water. The condensed water is called dew. The dew point
is a saturation temperature.
The Heat Index, sometimes referred to as the apparent temperature, is a
measure of how hot it really feels when relative humidity is factored
with the actual air temperature.
A hygrometer is a device that measures relative humidity. Relative
humidity is a term used to describe the amount or percentage of water
vapor that exists in air.
Range is defined as the amount or extent a value can be measured.