Iran held a public holiday for some areas over a scorching heatwave. An official holiday for public sector employees in eight ...

How low should you set your thermostat for as record-breaking heat sweeps over the country? Here's what experts and other ...

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.

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.