We are well into our first heat wave of the season, and it has been brutally hot. The heat index has been a very important number to pay attention to, and that will continue as we head into the ...

The heat wave cools across Michigan, but lingers in southern areas. Officials issued a heat advisory for 5 southern counties for June 26.

The heat index shows you what the temperature "feels like" to the human body by measuring air temperature and relative humidity (which is the amount of atmospheric moisture present, expressed in a ...

Excessive heat is dangerous. Here's what to know before it strikes South Jersey this summer.

Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

With a heat wave causing excessive heat warnings in Delaware, you'll hear a lot about the heat index this week. What to know and how to stay cool.

It is going to be punishingly hot in Columbus over the next few days, with highs in the 90s and heat index values over 100.

Chicago weather: Heat Advisory for area, Extreme Heat Warning for Cook County, heat index in 100s Chicago pools are now open across the city as temperatures soared into the 90s on Saturday.

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High temperatures in the upper 90s are forecast for Western Maryland and South-Central Pennsylvania from June 22-25. With humidity, the heat index could reach 105 degrees, creating dangerous ...