Key idea
Why the same WBGT can affect people differently depending on exposure, health, medications, and workload.

Getting used to heat

Repeated exposure can improve heat tolerance over time, but it does not remove risk. Returning after time away may call for renewed caution.

Consider the whole person

Illness, poor sleep, dehydration, medications, health conditions, clothing, and exertion can affect risk. Access to rest and cooling matters too.

Act on symptoms

Do not let a reassuring environmental number override signs of heat illness. Individual medical questions belong with a qualified professional.

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