![](https://api.time.com/wp-content/uploads/2025/02/AP25047619806775.jpg?quality=85&w=1200&h=628&crop=1)
U.S. Polar Vortex: What to Expect
BISMARCK, N.D. — Harsh cold descended on the nation’s midsection Monday as a polar vortex gripped the Rockies and Northern Plains on the heels of weekend storms that pummeled the Eastern U.S. with floods, killing at least 13 people. The National Weather …