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The two factors used to determine the heat index is air and temperature.

In order to determine the heat index using the chart above, you need to know the air temperature and the relative humidity.

How is the heat index determined?

To find the Heat Index temperature, look at the Heat Index Chart above or check our Heat Index Calculator.

Example, if the air temperature is 96°F and the relative humidity is 65%, the heat index how hot it feels is 121°F. The red area without numbers indicates extreme danger.

Thus,  air temperature and the relative humidity are two factors.

To learn more about heat index click here:

https://brainly.com/question/1922702

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