Erin Davis/Axios Visuals All of Virginia will be freezing early this week. Why it matters: The hazardous cold could be a public health risk, threaten to burst pipes, and stress electricity grids. The ...

The polar vortex's blast of Arctic air from Canada brought the season's coldest weather to the majority of U.S. The vortex is ...

A winter storm sweeping through the U.S. South on Tuesday was dumping snow at levels millions of residents haven’t seen ...

This blast of frozen temperatures is tied to a polar vortex... but what is that? Air spins around the notoriously cold North and South Poles. When the air is spinning fast, it's stable, but when it is ...