The polar vortex is beginning to stir, signaling the first signs of seasonal change. Here's when to expect the first frost in ...

As summer wanes in the Northern Hemisphere, scientists are sounding the alarm over what could be one of the most extreme ...

Summer may end on a cooler note for parts of the U.S., with meteorologists suggesting that a weakened polar vortex could ...

Fans in Green Bay suffered through frigid temperatures, thanks to Arctic air that has come southPhoto by Ronald Martinez/Getty Images It’s polar bear weather today for much of the Midwest.

New Yorkers are already looking to winter and the question remains as to what kind of winter it will be - balmy or bitter?

It's already a lot to endure frigid winter conditions, but what happens when we get an unwelcome visit from an even colder spell of air like a polar vortex? "A polar vortex is simply that: a vortex ...

A “civil war” is brewing in polar science. As climate change rapidly melts Earth’s ice, sides are being drawn among ...

After cuts by US President Donald Trump forced the closure of the popular climate.gov website, experts have launched an ...

First came orders to scrub references to how climate change disproportionately harms marginalized communities. Then demands ...

The past two days proved dismal for Cornell students and faculty, who battled freezing temperatures and wind chills of 29 degrees below zero across campus. As a mind-numbing polar vortex descends on ...