A deadly blast of arctic air shattered decades-old temperature records as it enveloped the eastern United States on Tuesday, snarling air, road and rail travel, driving energy prices higher and overwhelming shelters for homeless people.
At least eight deaths have been reported across the country because of the polar air mass sweeping over North America during the past few days. Authorities have put about half of the United States under a wind chill warning or cold weather advisory.
Temperatures were expected to be 25 degrees to 35 degrees Fahrenheit (14 to 19 degrees Celsius) below normal from the Midwest to the Southeast, the National Weather Service said.
The agency that oversees the electric grid supplying the mid-Atlantic and parts of the Midwest said electricity suppliers were struggling to keep up with surging demand as the cold forced some power plants to shut.