The planet recorded its hottest day ever Sunday, according to the European Union’s Copernicus Climate Change Service, as an unrelenting string of heat waves continue to topple daily record high ...

California and the West are still days away from the end of the current heat wave, which has brought oppressive and dangerous temperatures to many areas for almost a week. In a Monday forecast, 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 ...

Reliable predictions of how the Earth's climate will respond as atmospheric carbon dioxide levels increase are based on ...

Feeling warmer than usual? Learn how to tell if you have a fever, what a fever might mean for you and your baby, and how to ...