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,

A brutal air surge in the belly of the nation is heading to the Northeast — and the air in New Jersey may make it feel near zero degrees.