A Siberian chill is on the horizon, threatening to plunge the U.S. into a deep freeze in parts of the east coast

The most unusually cold air in the Northern Hemisphere will be over the United States early next week, bringing dangerously frigid conditions.

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.

A small temblor startled residents near Richmond this week. Over a decade ago, a 5.8 earthquake in Virginia became the most felt quake in the U.S.

Lawmakers were told to stay in the nation’s capital through the weekend, though many went home and are now at risk of having their flights delayed

As a massive winter storm is rolling through regions of the United States on Monday, see pictures of snow from across the Midwest and East Coast.

Flight cancellations and delays are stacking up as a major winter storm makes its way across the East ... out of the United States on Monday. Those flight cancellations hit the Washington, D.C ...

A disruptive winter storm barreling across the country slammed the East Coast on Monday, causing chaos at airports over the weekend and canceling more than 1,000 flights to start the work week.

The polar vortex of ultra-cold air usually spins around the North Pole, but it sometimes plunges southward into the U.S., Europe and Asia. Studies show that a fast-warming Arctic is partly to blame for the increasing frequency of the polar vortex extending its grip.

Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.

Some southern states are bracing for their biggest winter storm in several years as snow falls from the Rockies to the East Coast. On Thursday, the weather starts to deteriorate in northern and western Texas,

Jan. 19 (UPI) -- On this date in history: In 1861, Georgia voted to secede from the Union and joined the Confederacy. In 1920, threats against the life of Attorney General A. Mitchell Palmer, because of his activities in suppressing criminal radicalism, led officials to take every precaution to guard the head of the Justice Department.