Add Yahoo as a preferred source to see more of our stories on Google. Conditions are hot and humid in Michigan and getting hotter as the week goes on. Forecasters often refer to the heat index as a ...

As Pittsburgh's temperatures climb toward triple digits, these are the key heat-related weather terms you should know.

Another round of sweltering heat is in store for much of the U.S. this week. But temperatures could feel even hotter. Here's ...

You've probably heard someone say during the summer, "It's not the heat, it's the humidity." And, they're kind of right. Both temperature and humidity factor into the "feels like" temperature — also ...

But another measure, the heat index, could do just that. In Milwaukee, the Nation Weather Service forecast for Tuesday, June ...