A polar vortex has triggered freeze warnings across Texas, leading to dangerous conditions for people and infrastructure.

National Weather Service meteorologists warned of temperatures cold enough to be fatal descending across most of the nation.

Amid the coldest air of the season, a map showed the expansive footprint of the storm that will bring disruptive weather to nearly 1,400 miles in the South through the weekend.

Chances were lower in southwestern Colorado and northwest/west Texas, the map showed. There was a 20 to 30 percent ... States now forecast for snow included Kansas, Missouri, Arkansas and Oklahoma, as ...

Another winter storm is expected to sweep across the Midwest and Mid-Atlantic regions of the country this week, blanketing Texas and and the Carolinas with snow.