Frigid air that normally stays trapped in the Arctic has escaped, plunging deep into the United States for an extended visit ...

The polar vortex has triggered freeze warnings and advisories across Texas, threatening human safety and infrastructure.

The polar vortex of ultra-cold air usually spins around the North Pole, but it sometimes plunges south into the U.S., Europe and Asia. Studies show that a fast-warming Arctic is partly to blame for ...

Lower Hudson Valley residents woke up to snow cover and slippery streets Tuesday morning after brief snowfall Monday. When ...

According to Texas law, it is illegal to leave your dogs and cats outside without adequate shelter, food, and water. That ...