60 million Americans in more than 30 states are under the "invasion" of a major storm that could bring the heaviest snowfall and coldest temperatures in more than a decade.
A polar vortex has brought cold weather from the Arctic to the central US, with extreme weather conditions.
Thousands of flights have been delayed or canceled, many roads have been blocked and schools have been closed as a result of the storm.
A state of emergency has been declared in many states such as Kentucky, West Virginia, Arkansas and parts of New Jersey.
Among the worst-hit areas on Sunday were Kansas and Missouri, with snowstorms reaching up to 30cm in some places.
The storm is also expected to affect the capital, Washington, and its surrounding areas.
Meteorologists predict that the weather is expected to begin to calm down in the coming days.