Wet Bulb Globe Temperature vs. Heat Index | Which is better?

Heat index is the most commonly used parameter for measuring the dangers of summer heat, but is it the most accurate?
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[@usthem5059]

"Most people don't work in the sun, if you're working outside." Clearly this man has never worked outside before.

[@153ichthus]

Or, perhaps he wants to be the next Jim Cantore and only works outside when the weather is really, really crummy. :D