What is the Heat Index?

The Heat Index is the measure of how hot it really feels, once the relative humidity is factored in with the temperature of the air.  For example, if the air temperature is 94° with 60% humidity, it will feel like it is 110°.  The National Weather Service will begin alert procedures when the Heat Index is expected to exceed 105°-110°F (depending on local climate) for at least 2 consecutive days.