Michigan's heat wave this week will feel even warmer because of high humidity. Here's how the heat index works.

The metric of how hot the air actually feels has roots in a 1979 journal paper called “The Assessment of Sultriness.” By Andy Newman In recent days, you may have seen or heard many mentions of a ...

The number on the thermometer only tells half the story. Here’s what to know about heat index—and why some scientists are rethinking how it is calculated. A member of a drum and bugle corps recovers ...

Heat is the No. 1 weather-related killer in the United States, but the danger of prolonged heat can be difficult to convey, ...

The thermometer may read in the mid-90s, but by this weekend, stepping outside in much of Alabama could feel more like walking into a 100-degree sauna. The National Weather Service forecasts afternoon ...

Temperatures in the Louisville area are rising, with highs predicted to reach 92 degrees. The heat index, which combines temperature and humidity, will make it feel close to 100 degrees. Safety ...

Wednesday and Thursday, June 10-11, are forecast to be the hottest days this week in Michigan with 90-degree highs that will make it feel like you're stepping into 100-degree weather. Weather ...

Meteorologist David Yeomans forecasts on CBS News Chicago weekdays at 11 a.m. and 4 p.m., and reports on the Climate Watch team. The Chicago area is facing a dangerous heat wave next week, with ...

A heat dome is expected to bring potentially dangerous weather conditions to Upstate South Carolina. The National Weather Service warns these conditions can quickly become life-threatening.

Add Yahoo as a preferred source to see more of our stories on Google. ABOVE: The latest forecast update from Severe Weather Center 9. To stay on top of changing weather conditions, be sure to download ...

Parts of New York will face dangerous heat and humidity through the end of the week, with the National Weather Service issuing heat advisories for several regions, including Rochester, Canandaigua, ...

A heat advisory has been issued for parts of downstate New York as hot and humid conditions are expected to push heat index values into the upper 90s through Friday, according to the National Weather ...