Another arctic blast has sent temperatures plummeting across the United States, bringing “life-threatening” wind chills and dangerous cold to millions of Americans this week. The latest brutal cold snap is again courtesy of the polar vortex — a large area of cold air that spins over the North Pole — dropping some 3,

An arctic blast will strike Austin from Tuesday night until at least Friday, the National Weather Service's Central Texas office said.

Overnight, our attention shifts from the potential icy spots to the dangerous cold. Most of the area is under an Extreme Cold Warning through 9 a.m. Thursday. This means wind chills could be as cold as ten below zero.