A wave of snow, ice, winds and plummeting temperatures created hazardous travel conditions in parts of the central United States on Sunday, as a winter storm was expected to bring the possibility of the "heaviest snowfall in a decade" to some areas.
Snow and ice covered major roads across much of Kansas, western Nebraska and parts of Indiana, where the state's National Guard was activated to help stranded travelers. At least 8 inches (20 cm) of snow was expected, as the National Weather Service issued winter storm warnings for Kansas and Missouri.
The warning was also extended to New Jersey for Monday and until the early hours of Tuesday.
"For the locations in this region that will see the heaviest snowfall, it could be the heaviest rainfall in at least a decade," the weather service said early Sunday.
About 63 million Americans live in areas that could be affected on Sunday, according to specialist Bob Oravec, with the National Weather Service.
The polar vortex of extremely cold air usually revolves around the North Pole. People in the United States, Europe, and Asia experience its intense cold as the air currents shift south.
Studies show that rapid warming in the Arctic is partly responsible for the increasing frequency of the polar vortex, which is expanding its icy influence.
The storm is also expected to affect the capital, Washington, and its surrounding areas.
The National Weather Service predicted 20 to 30 centimeters of snow for the Annapolis, Maryland, area, with temperatures remaining below freezing throughout the weekend.
In a statement on the X network, Virginia Governor Glenn Youngkin declared a state of emergency Friday evening ahead of the storm and encouraged residents to vote ahead of the state's special election on Tuesday.
Similar declarations of states of emergency were made in Kansas, Kentucky, Maryland and in central Illinois cities.
"It's really serious," meteorologist John Gordon said at a news conference in Louisville, Kentucky./ VOA