More than 60 million Americans are in the grips of a huge winter storm that could bring the heaviest snowfall and coldest temperatures in over a decade
A state of emergency has been declared in seven states – Kansas, one of the worst-hit areas, Missouri, Kentucky, Virginia, West Virginia, Arkansas and parts of New Jersey.
Forecasters say the extreme weather is caused by a polar vortex – an area of cold air that circulates around the Arctic – bringing cold weather to the central US.
![A snow-covered stretch limousine sits parked in downtown Louisville, Kentucky](https://ichef.bbci.co.uk/ace/standard/640/cpsprodpb/vivo/live/images/2025/1/6/0af6d5c6-5456-4238-b84c-f9124aa2faf6.jpg.webp)
Thousands of flights have already been delayed or cancelled, with many roads cut off and schools shut as a result of the storm.
![FedEx plane sits on runway covered in snow with snow falling and scaffolding resting up against the plane](https://ichef.bbci.co.uk/ace/standard/1024/cpsprodpb/934d/live/cc5d4dd0-cc0e-11ef-94cb-5f844ceb9e30.jpg)
There’s a warning that wind chill values are expected to cause temperatures as low as 16 degrees Fahrenheit (-8C). Dangerous surf, reaching up to seven feet, and life-threatening rip currents are also expected in coastal areas, including Alabama and northwest Florida beaches.
![A vehicle travels westbound in blizzard conditions during a winter storm on Interstate 70 in Topeka, Kansas](https://ichef.bbci.co.uk/ace/standard/640/cpsprodpb/vivo/live/images/2025/1/6/65056ad7-4a3c-42c7-bd0e-750adddc5d2b.jpg.webp)
The National Weather Service for Mobile, Alabama, says in a post on X (formerly Twitter) that hypothermia is possible if precautions are not taken.
![Streets covered in snow in Dayton, Ohio](https://ichef.bbci.co.uk/ace/standard/640/cpsprodpb/vivo/live/images/2025/1/6/f1e0e3f7-a3a0-4ab3-81d6-f552222e2ebd.jpg.webp)
People are being advised to avoid going outside if possible and dressing in layers to conserve warmth.
The weather is expected to begin easing on Monday.