Portions of North Dakota, Montana and Minnesota are all bracing for wind chill temperatures that could plunge to -30 degrees ...

A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by ...

Bitter temperatures are forecast to hit swathes of the U.S. this weekend as a polar vortex—the area of cold air that ...

Northeastern North Dakota is likely to feel the brunt of the cold blast, with highs on Wednesday and Thursday in the single digits below zero, and overnight wind chills around minus 40.

* WHAT...Very cold wind chills as low as 40 below expected.* WHERE...Portions of north central and northwest Minnesota andnortheast and southeast North Dakota.* WHEN ...