Severe winter weather sweeps across US, disrupts holiday travels

The National Weather Service Weather Prediction Centre tweeted on Thursday that "a strong cold front continues to rapidly move through the middle of the country this morning with remarkable temperature drops, strong winds creating dangerous wind chills, and bursts of snow".

The winter storm, likely to intensify into a bomb cyclone, is expected to create record-low temperatures for Christmas weekend in many parts of the United States, reported Xinhua.

US President Joe Biden told reporters Thursday that the White House has "tried to contact 26 governors so far in affected regions".

"Please take this storm extremely seriously," Biden said. "This is not like a snow day, you know, when you were a kid. This is serious stuff."

Kentucky Governor Andy Beshear is urging people to stay off the roads as the state is bracing for the severe cold weather.

"We are urging Kentuckians to stay off the roads starting Thursday afternoon," Beshear tweeted. "If you are an essential worker and must travel, please follow these safety tips and have a vehicle kit in your car."

Airlines have cancelled more than 2,000 flights within, into, or out of the United States as of early Thursday afternoon, according to the flight-tracking site FlightAware.