By Rich McKay

(Reuters) – Millions of Americans from the Plains to the East Coast face the threat of blizzards, heavy snow, treacherous ice and freezing rain through Monday, the National Weather Service said on Saturday.

The governors of Kentucky and Virginia declared states of emergency ahead of the winter storm.

“The storm is still moving,” meteorologist Rich Bann of the NWS’s Weather Prediction Center said Saturday night. “But this thing has many dangers from heavy snows in the Plains to significant ice covering roads farther south.”

He added that more than 60 million people in the US were affected by winter weather warnings, watches or advisories this weekend.

A swath from Nebraska and Kansas through Ohio, Indiana, southwestern Pennsylvania and northwestern Virginia will see from 1 inch (2.54 cm) to 1 foot (30 cm) of snow. Ice can knock down power lines and cause widespread outages.

A wintry flurry of freezing rain and hail will hit southern Missouri, Kentucky and Tennessee on Sunday, Bann said, likely making roads dangerous and downing power lines.

“It’s almost impossible to drive in some places,” he said.

Kansas City International Airport in Missouri was temporarily closed Saturday afternoon due to heavy ice accumulation, officials said on social media.

Bann said the storm should move up the East Coast and into the Atlantic Ocean by late Monday, but a fresh burst of Arctic air will bring freezing temperatures to the eastern two-thirds of the U.S. by mid- middle of next week.