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This depends greatly on the relative humidity as well as the temperature. A wet-bulb temperature of 35 Co is hazardous to human life. The human body depends upon evaporative cooling (sweating, etc) for its cooling, and if the wet-bulb conditions above are exceeded, one's body will overheat, leading to hyperthermia. And rapid failure.

There are certain occupations (fire-fighters, bomb-disposal,) where the clothing limits the cooling.

In mining, the Earth warms as one descends, and in the Mpoeng mine in S Africa, the temperature at the workings reaches 65 Co. As well as extansive cooling methods which reduce the temp to about 30 Co, the miners who work here are carefuly selected as to be able to do physical work in these conditions. Some S African mines reach 4 km deep!

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10y ago
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Q: What temp can a body not handle?
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