I've never heard it called a humidex index, just heat index. It's pretty invaluable here where the humidity gets high enough that your sweat doesn't evaporate.

I've never heard it called a humidex index, just heat index. It's pretty invaluable here where the humidity gets high enough that your sweat doesn't evaporate. In the desert, I just had to wear sunscreen and keep drinking water. In the Midwest, it can be 10 degrees cooler and you have to stop and find somewhere to cool down regularly. Your body just can't dump heat with that much moisture in the air.