The intense heat set to grip parts of the U.S. may push northward this week, bringing humidity and above-seasonal ...

Heat and humidity will once again smother the eastern half of the country this week, pushing the heat index to dangerous levels for tens of millions of people. In the Midwest, the humidity will be ...

Even without reaching heat wave levels, sustained high temperatures may contribute to a litany of health issues.

The rash of global heat waves across the Northern Hemisphere comes as average global temperatures continue to climb, driven ...

Above 79 degrees Fahrenheit (26 degrees Celsius) the risk of developing heat-related illness rises sharply. While heat exhaustion, when caught, is treatable with fluids, rest, ...

Annual heat-related deaths worldwide for people over 65 are projected to increase by 370% through the middle of the century if global temperatures rise by 2 degrees Celsius, a new report says.

Growing up in Texas, Mary Beth Walsh thought she was accustomed to high temperatures. Her hometown of Dallas, which is currently being blasted by unrelenting heat, frequently experiences heat waves.