Heat Waves - The Heat Index
temperature body feels humidity
The heat index is the temperature your body actually feels based on the air temperature and humidity. For example, if it is 90°F (32°C) outside and the humidity is 80 percent, it feels like it's 113°F (45°C). It is important to note that if you are in direct sunlight during a heat wave, you must add 15° to the heat index to account for the extra heat you get from solar radiation. On the day described above, your body would be experiencing a temperature of 128°F (53°C)!