It’s really, really cold again — as the US shivers through at least the eighth blast of air from the Arctic this winter.

Since the polar vortex hit Michigan in January, there have been few days with temperatures above freezing. People are doing everything they can to stay toasty from layering up on their clothing to ...

WASHINGTON—The polar vortex hit its peak across much of America on February 19, with an icy grip that made Arctic Greenland seem like a toasty vacation spot in comparison. Even Mars has been warmer ...