Penn State physiology professor explains how extreme heat harms the human body

W. Larry Kenney, professor of physiology and kinesiology at Penn State University, spoke to NPR's A Martinez about how extreme heat affects the human body amid current U.S. heatwaves. He highlighted the risks of overheating, dehydration and heatstroke, noting that older people, children and those with chronic conditions are most vulnerable. The interview came as heatwaves continue to sweep across the United States.

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