If you thought the worst of the summer's sweltering temperatures were behind us, think again. Some schools closed early as the late-August heat wave gripping Ohio brought temperatures not seen in ...

This year’s biggest climate change news was that 2014 was hottest year on record. Turns out, there’s bigger news: It was also the hottest year in the oceans, which are warming so fast they’re ...

The temperature on any given summer day may be in the 80s or 90s. So why does it feel so much hotter and oppressive at times? That's the heat index doing its thing. Here's how it works: What is the ...