A passenger searches through hundreds of unclaimed suitcases near the Southwest Airlines baggage claim area at Nashville International Airport after the airline canceled thousands of flights. (Seth Herald / AFP)
Thousands more flights were canceled across the United States on Wednesday, with no end in sight to days of travel misery as the country digs out from a deadly superstorm.
Officials in Erie county in western New York -- the area of the country hardest hit by the massive winter storm -- lifted their death toll to 34, taking the national total to at least 56.
Around-the-clock work to restore electricity continued in the county's main city of Buffalo, with the number of outages down to 500 residents, Mayor Byron Brown tweeted early Wednesday.
Another kind of crisis was playing out at US airports around the country, as Southwest Airlines was forced to cancel thousands more flights to try to recover from a spiraling logistics breakdown.
The airline's woes stranded thousands of customers as well as pilots and flight attendants.
Donald Sneyder, whose Sunday flight from Baltimore to Indianapolis was canceled, returned to the airport Wednesday in hopes of reuniting with his suitcase.
"I didn't try to come earlier this week, it seems to have been such a mess," Sneyder told AFP while waiting in line at the Southwest baggage area.
The storm, which descended on the United States just before the busy Christmas holiday weekend, led to unusually cold weather in much of the country, including southern states like Texas and Florida.
Temperatures were moderating nationwide Wednesday, including in Buffalo, even as the region remained in triage mode.
The city, on the shores of Lake Erie near the Canadian border, has seen a majority of the storm-related fatalities.
As temperatures plummeted Friday night, commuters and some residents fleeing their freezing homes became trapped on highways, with first responders unable to reach them.
Of the confirmed deaths, three bodies were yet to be identified, Erie County Executive Mark Poloncarz told a news conference.
The National Guard planned to conduct door-to-door wellness checks for every home in areas that lost power, Poloncarz said on Twitter, while reiterating that a driving ban was still in effect for Buffalo.
"We know that some people are low on food," he said. "We have rations available at area warming centers. Please work with neighbors and friends, walk to open stores if possible."
Southwest Airlines was still days away from resolving its systemwide breakdown: the carrier canceled more than 2,500 flights on Wednesday, accounting for nearly 90 percent of all scrubbed US flights, according to tracking website FlightAware.
In a series of media appearances, Transportation Secretary Pete Buttigieg recounted telling Southwest Chief Executive Bob Jordan that the government would "hold them accountable" in requiring the airline to compensate customers for the mounting costs of canceled flights and travel-related expenditures.
Jordan said he was "truly sorry" and promised to "make things right for customers," according to a video statement posted to Southwest's website.
"We're optimistic to be back on track before next week," he added.
Jordan has acknowledged that the problems have underscored the need to upgrade outdated trip scheduling software that became overwhelmed in the storm.
The problem has been highlighted by the flight attendants union, which has called on Southwest to invest more on employees. Several leading Southwest unions remain locked in contract negotiations after earlier pacts expired.
Another union, the TWU Local 555, which represents ground workers, said the meltdown reflected Southwest's failure to adapt its systems as its operations have evolved.
"Although it can be complicated, especially during the holiday season, we need to consider better spacing of flights during extreme weather events in the bitter cold of winter -- as well as the extreme heat of summer," said Local 555 President Randy Barnes.
In times of extreme weather, "we should consider slowing the entire schedule," Barnes said.
Some travelers took matters into their own hands.
Recognizing that Southwest would not get them to Boston from Arizona in time for Monday's NHL Winter Classic, Tim Maher rented a car for his six-member family and launched a cross-country drive.
Maher told CNN the ride itself had been surprisingly fun, but the family did not have its luggage -- a common problem for customers.
"I'm thinking about people's luggage, they're not able to get their luggage for a week. I'm thinking this is crazy," Maher told the network.
"People have gifts or medication or electronics in those bags they just handed you, thinking they'd get it in a couple of hours."