Sixty-three million Americans are under blizzard warnings as the country braces for the coldest storm since 2011, which is set to bring travel chaos and deadly whiteouts.

The National Weather Service has warned that Storm Blair will bring freezing conditions to 30 central and eastern states from Colorado to Massachusetts. 

Kansas City International Airport has already announced that no major airlines will be operating today after the region was deluged with snow and arctic wind chills. 

A state of emergency has also been declared in Kentucky, Virginia, Kansas, Arkansas and Missouri, where the current bone-chilling climes are a rarity. 

Wind chills of -20F and even colder have hit Kansas, where the average low temperature for January is 21F, according to the National Oceanic and Atmospheric Administration (NOAA).

In Kentucky, temperatures are set to plummet to 2F, down from an average low of 26F, and in Virginia, where average lows are usually around 28F, the mercury is set to drop down to 13F. 

Missouri is set to see temperatures of 3F, while in Arkansas it could get as cold as 21F. 

Central states will be impacted on Sunday morning, with the storm bringing up to five inches of snow and 45mph winds to affected areas before moving east on Monday.

Meteorologists said a polar vortex spinning across from the North Pole via the jet stream is causing the intense dose of cold air to envelop the country. 

A whopping 72 percent of flights out of Kansas City International had been canceled by 10am Sunday, where 'rapid ice accumulation' forced officials to close the airfield. 

Even more travel chaos is expected on Sunday, with 1,176 flights delayed and 748 canceled across the US as of 10am, according to live tracking website FlightAware. 

Meanwhile, icy weather has already sparked collisions on the roads, including in Kansas, according to state highway patrol trooper Ben Gardner. 

Gardner posted a video on X showing a truck which had rolled over on the Interstate 135, while skidding across the ice himself to demonstrate the dangerous conditions.