Winter storm updates: Dozens dead across US in wake of massive snowfall, deep freeze

At least 540,363 customers were without power as of 6:00 a.m. ET on Tuesday, according to PowerOutage.us, with Tennessee, Mississippi, Louisiana and Kentucky hit the hardest.

At least 173,997 customers were without power in Tennessee, 140,375 customers in Mississippi, 99,614 customers in Louisiana and 28,072 in Kentucky, PowerOutage.us said.

Also without power were 27,920 customers in Texas, 14,132 in South Carolina, 12,984 in Georgia, 10,412 in Virginia, 6,506 in West Virginia and 4,794 in Florida.

The Nashville Electric Service -- which as of Monday was the hardest-hit utility in the country according to PowerOutage.us -- said it planned to "double its workforce" to respond to the outages.

-ABC News' Aidan Gellert and Charlotte Slovin

More than 5,100 flights have already been canceled within, into or out of the U.S on Monday, with flights leaving Dallas, Boston and New York City hit the hardest, according to FlightAware.

Since Friday, more than 20,000 flights have been canceled due to the storm. Over 11,000 flights were canceled on Sunday, marking the highest day for cancellations since the pandemic, according to Cirium data.

While the number of cancellations is significantly lower compared to Sunday, it still remains high as airlines are working to recover and resume normal operations.

Flights resumed Monday at Ronald Reagan Washington National Airport after the airport stopped all flights Sunday due to the storm.

-ABC News' Ayesha Ali

Olympian Shaun White went snowboarding in New York City’s Central Park, where 11 inches of snow was on the ground.

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Snowboarding in Central ParkAs the winter storm comes to a wrap, some Americans are taking advantage by enjoying a snow day in Central Park in New York City.

ABCNews.com

More than 11 inches of snow fell in Central Park in New York City, marking the city’s biggest snowfall since 2022. Philadelphia recorded over 9 inches, its biggest snowfall in a decade, while Boston recorded more than 16 inches.

The Northeast states saw massive snow totals: 17 inches in Connecticut and New Jersey, 16 inches in Rhode Island, 11 in Maryland, 20 inches in Massachusetts and 23 inches in Pennsylvania.

In the Midwest, snow totals hit 14 inches in Indiana and Illinois.

Even the South saw major snow, with 11 inches recorded in the Little Rock, Arkansas, area and 5 inches in Tennessee.

Dangerous freezing rain is also making streets extremely slick in the South. An inch of freezing rain was recorded in Greenville, South Carolina, and Cherokee, Alabama, while Nashville, Tennessee, has half an inch of freezing rain.