Human Body Limit to Heat Stress from Abrupt Climate Change

Paul Beckwith
Published on Aug 3, 2018

The average persons core body temperature is 98.6 F (37 C). Human skin is a few degrees colder, being about 35 C (95 F). Heat travels from hot regions to cold regions, according to the Second Law of Thermodynamics. Thus when the wet-bulb temperature, which is the temperature at 100% humidity, reaches 35 C (95 C) the human body can no longer shed heat (sweat no longer evaporates), thus core body temperature rises, and the healthiest person, sitting in the shade, dies in about 6 hours. The rest of us (young, old, medicated, out-of shape, obese, etc…) are SOL at even lower wet-bulb temperatures. Adaptation would require living inside with AC, living in caves, or wearing cooled suits; who wants to do that?

More at:

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s