Thermometers are superb at measuring temperature but lousy at describing it. A bulb of mercury tells me it’s 55 degrees–but what’s 55 degrees? When was the last time I walked into a room and said, ...

As the mercury rises outside, an internal thermostat regulates our average body temperature to 98.6 degrees Fahrenheit. So why do we feel hot when it’s nearly 100 degrees outside, as is possible again ...

With near record-breaking heat expected the first week of June, here's a friendly reminder not to leave pets in the car. It takes just a few minutes for temperatures to rise to dangerous levels.

Extreme heat has been breaking records across Europe, Asia and North America, with millions of people sweltering in heat and humidity well above “normal” for days on end. Death Valley hit a ...