Cities across the US have been digging themselves out after a snow and ice storm that stretched for thousands of miles.
The storm cut a swathe from New Mexico to Maine on Wednesday, paralyzing much of the Midwest. Airlines set about unraveling schedules and getting passengers on their way after more than 10,000 flights were cancelled over two days.
Plummeting temperatures in the central US complicated recovery efforts, touching everything from the winter wheat crop to rail transportation to preparations for the NFL's Super Bowl on Sunday in Dallas.
More bad weather is on the way for some places. Parts of the southern United States, including Texas, Louisiana and Alabama, are forecast to get snow and ice late on Thursday.
The National Weather Service issued special advisories about black ice for New York and Boston. Wednesday's standing water on many streets and sidewalks froze overnight, making driving and walking treacherous in spots.
Chicago's Lake Shore Drive, crippled during the city's third-worst snowstorm on record, reopened on Thursday after 34 hours. Crews worked overnight to tow hundreds of cars still stranded by the storm.
