A chilling polar vortex is set to bring snow and ice to the South and East this week. We show where.

A dramatic blast of cold air may be coming for the United States in late January, courtesy of the polar vortex. Here's what could happen.

A chilling polar vortex is set to bring snow and ice to the South and East this week. We show where.

Winter storms and extreme cold are forecast to wallop the U.S. with snow and ice through the weekend. Prepare for power outages and transportation issues.

Officials, including airport authorities in several major cities, are warning travelers to brace for significant delays amid the severe winter weather.

Massive winter storm to affect half of the US population with snow, ice and extreme cold temperatures this weekend.