With climate change causing temperatures to rise across the globe, extreme heat is becoming more common — and thus a bigger health threat. The human body is resilient, but it can only handle so much.

Over the past few decades, evidence has been mounting that the average human body temperature is not really 98.6 degrees Fahrenheit. Instead, most people’s baseline is a little bit cooler. The ...

When you’re feeling sick and wondering whether to go to work or school, the thermometer often has the final verdict. Most people have been taught a body temperature of 98.6 Fahrenheit is normal, while ...

For 150 years, 98.6 degrees Fahrenheit was thought to be the average body temperature for a healthy human being. But that number is wrong. “Doctors are no different from anybody else,” says Julie ...