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

As climate change worsens, the people delivering your food are increasingly exposed to heat, wildfire smoke and other ...

A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by ...

The National Weather Service said that wind chill temperatures could dip into the teens to low-20s from Texas across the Gulf Coast.

It's a term you hear every couple of winters, when we get stuck in the coldest of cold patterns – polar vortex. But what exactly is it?

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

A huge swath of the United States was blasted with ice, snow, and wind on Monday as the polar vortex that dipped south over ...

The expanding of the polar vortex – an area of cold air around the Arctic – southwards is causing cold spells in the US.