Polar Vortex Stretches Across U.S.

LOUISVILLE, Ky. (AP) — Harsh weather moved west as a polar vortex was expected to grip the Rockies and the northern Plains after winter storms pummeled the eastern U.S. over the weekend, killing at least 10 people, including nine victims in Kentucky who died during flooding from heavy rains. The National Weather Service warned of “life-threatening cold” into Tuesday, with temperatures in northeastern Montana predicted to dip as low as 45 degrees below zero. Weather forces in the Arctic are combining to push the chilly air that usually stays near the North Pole into the U.S. and Europe. In Kentucky, Gov. Andy Beshear said Sunday that at least 1,000 people stranded by floods had to be rescued.