Record cold temperatures are expected to hit parts of the United States this week. Arctic air amassing in northern Canada is expected to surge into the central U.S. late this week

As all of Michigan hurtles toward a multi-day stretch of a deep winter freeze, the National Weather Service has expanded the Extreme Cold Warning area across most of the state. The only places not under an Extreme Cold Warning are the Southeast corner of the state - from Saginaw and The Thumb down to Flint,

Extreme Cold Watches and Extreme Cold Warnings are relatively new.