Dangerously cold weather spread over the Midwest on Saturday and is headed toward the East Coast, where temperatures well below seasonal norms are expected starting late Sunday and into next week.

Temperatures will plummet as Arctic outbreak brings frigid weather to much of the U.S. Much of the United States will see temperatures plummet 20 to 40 degrees below average when a major Arctic outbreak bringing frigid temperatures sweeps through the country.

A cold front that moved through Saturday morning has unlocked the cold air, and temperatures are falling down from here. Frigid conditions that could have impacts to your normal routine has sparked First Alert Weather Days for Monday,

A polar vortex dipping down from Siberia will bring a cold front with frigid temperatures to nearly 300 million Americans. See maps of the arctic blast.

A brutal polar vortex is set to bury the Big Apple in snow Sunday and then deliver deadly single-digit temperatures that will feel like 15 degrees below zero.

The Arctic is heating up particularly fast as a result of global warming—with serious consequences. The widespread permafrost in this region, where soils currently store twice as much carbon as the atmosphere,

Extreme cold could expose residents of several states to conditions like hypothermia and frostbite over the weekend.

It will be the coldest Inauguration Day since former President Ronald Reagan’s second inauguration in 1985, when the noon temperature was 7 degrees.

Millions are bracing for subzero wind chills this weekend as the coldest air of the season hits most of the country. The Arctic blast will bring snow squalls to several states, and seven other states are expecting heavy snow ahead of the plunging temperatures.

With the Arctic freeze on its way to Colorado and expected to last for several days, it's important to keep your pets well-protected during this deep freeze.

A potent cold front will enter the north-central U.S. before roaring across much of the rest of the nation over the weekend.