Atlanta (CNN) The winter storm that socked the Southeast has moved up the East Coast. The National Weather Service predicts the storm could drop a foot of snow in Boston, 2 feet on the Massachusetts coast, 7 inches in New York and 5 inches in Philadelphia by Sunday morning.

The Cape Cod area of Massachusetts looked like it would receive the heaviest blow. The weather service issued a blizzard warning for that area until 3 a.m. ET Sunday, saying "near-whiteout" conditions were possible. Winds could hit 45 mph, the weather service said.

Going back to work on Monday could be treacherous. Temperatures won't rise above freezing until Tuesday, the weather service said.

Boston Mayor Marty Walsh urged the city's citizens to look out for each other and help keep the streets cleared.

"If we can all work together to remove the snow rather than push it around, we'll be in good shape for Monday morning," he told CNN affiliate WBZ

Travel problems

Thousands of travelers had flights canceled up and down the East Coast because of the winter weather and the shooting at Fort Lauderdale-Hollywood International Airport in Florida.

Photos: Winter storm moves up East Coast Photos: Winter storm moves up East Coast A truck plows sleet and snow from an on-ramp along Interstate 40 near Chapel Hill, North Carolina, on Saturday, January 7. A messy mix of snow, sleet, ice and rain blanketed much of the Southeast as a winter storm swept through the region Hide Caption 1 of 14 Photos: Winter storm moves up East Coast Shelves sit mostly empty at a supermarket in Atlanta on Friday, January 6. Shoppers emptied shelves of bread and milk, road workers began working 12-hour shifts and states of emergency were declared in Alabama, Georgia and the Carolinas ahead of the winter storm. Hide Caption 2 of 14 Photos: Winter storm moves up East Coast A woman walks her dog near ice-covered trees in Atlanta's Piedmont Park after a winter storm passed through on January 7. Hide Caption 3 of 14 Photos: Winter storm moves up East Coast This image provided by the Connecticut State Police shows the scene of a pileup involving as many as 20 vehicles on Interstate 91 in Middletown, Connecticut on Saturday, January 7. No serious injuries were reported. Hide Caption 4 of 14 Photos: Winter storm moves up East Coast A car travels down icy roads early Saturday, January 7, in Hoover, Alabama. Gov. Robert Bentley declared a state of emergency, putting 300 Alabama National Guard soldiers on standby. Hide Caption 5 of 14 Photos: Winter storm moves up East Coast Workers clear the sidewalks of an office park on January 7 in Charlotte, North Carolina. Hide Caption 6 of 14 Photos: Winter storm moves up East Coast Mark Blackwell with Bradley Wrecker Service pulls a truck from a ditch near Charlotte Douglas International Airport early on January 7 after the storm dumped several inches of snow across parts of North Carolina. Hide Caption 7 of 14 Photos: Winter storm moves up East Coast Barry Boykin throws snow on his neighbors Larniece Clemmons, Taylor Porter, Shondell Porter and Jaynea Smith, as they play Saturday, January 7 in Winston-Salem, North Carolina. Hide Caption 8 of 14 Photos: Winter storm moves up East Coast Vanessa Kirschner gives her friend, Victoria Koniuk, a push on a swing Saturday, January 7, in Winston-Salem, North Carolina. Hide Caption 9 of 14 Photos: Winter storm moves up East Coast A tree fell on this Atlanta house early Saturday, January 7, trapping a child, who was rescued through a window. No one was injured. The storm knocked out power to more than 10,000 customers across metro Atlanta by early Saturday, Georgia Power said. Hide Caption 10 of 14 Photos: Winter storm moves up East Coast A person crosses the pedestrian bridge in the Public Garden during a winter storm in Boston on January 7. Hide Caption 11 of 14 Photos: Winter storm moves up East Coast Sledders enjoy the snow at Randolph College January 7 in Lynchburg, Virginia. Hide Caption 12 of 14 Photos: Winter storm moves up East Coast Children play in New York City's Central Park during a winter storm on January 7. Hide Caption 13 of 14 Photos: Winter storm moves up East Coast People walk on the boardwalk on January 7 in Ocean City, Maryland. The storm dumped more than eight inches of snow on Maryland's lower Eastern Shore. Hide Caption 14 of 14

Alexia Marramarco a French foreign exchange student on her way back to Georgia State University in Atlanta, was one of them.

First, her flight Friday from Paris to Fort Lauderdale was diverted to Miami because of the shooting. Then, after being bused to Fort Lauderdale, Marramarco learned her connecting flight to Atlanta was canceled because of weather.

"I haven't slept," she said Saturday.

Asked if she thought she'd get back to campus by Saturday night, she said, "Je ne sais pas." ("I don't know.")

The Fort Lauderdale airport closed one of its four terminals after the shooting but reopened it for flights on Saturday afternoon.

FlightAware, an airline tracking website, listed more than 2,100 cancellations within, into or out of the United States by 6 p.m. ET Saturday. Airports in Boston and Philadelphia urged travelers to check with their carriers about their flight status.

Drivers also ran into problems.

A pileup involving as many as 20 vehicles shut down a section of Interstate 91 near Middletown, Connecticut, on Saturday afternoon, WBZ reported . No serious injuries were reported.

In Virginia, one highway fatality occurred Saturday afternoon when an SUV ran off a road in Greene County, the Virginia State Police said. State police responded to 527 traffic crashes on Saturday.

North Carolina State Highway Patrol troopers have responded to nearly 1,500 calls for service and more than 700 vehicle collisions since midnight.

North Carolina

North Carolina took a heavy punch Friday night, with CNN affiliate WRAL reporting that Raleigh saw about 2 inches of snow but surrounding areas, including Orange and Durham counties, got 6 inches or more.

Though snow tapered off Saturday, driving conditions will remain hazardous because of low temperatures and ice on the highways.

"Throughout Monday the weather is going to be pretty cold and whatever is on the road will still be there," Gov. Roy Cooper said. He said that, so far, there are no weather-related fatalities.

Cooper said 9,300 customers were without power at 4:30 p.m. ET Saturday, down from 25,000 earlier in the day. Utilities expected to restore electricity to most of those them by the end of Saturday.

Weather and traffic resources These federal government resources have maps you can use to check weather conditions, flight delays, traffic and road closures in your area: Weather www.weather.gov Flight delays www.fly.faa.gov/flyfaa/usmap.jsp Traffic and road closures www.fhwa.dot.gov/trafficinfo

The weather was so bad in the Triangle area that the Saturday night basketball game between the University of North Carolina and NC State University was postponed until 1 p.m. Sunday.

Two hikers lost for more than a day in a remote section of the Shining Rock Wilderness area of western North Carolina were located late Saturday and airlifted to a hospital, The Asheville Citizen-Times reported.

The two men went for a day hike Thursday and called authorities the next morning to report they were lost and off the trail, WLOS reported. Besides teams on foot, helicopters with heat-sensitive cameras searched the area, Cooper said at a news conference Saturday.

Georgia

The storm that Atlantans were warned about Friday, sending them flocking to the grocery store, didn't pan out for the most part.

Three to 5 inches of snow were predicted, but only a dusting of snow fell on the city, though icy conditions persisted through Saturday and conditions stayed below freezing. Wind chill was also a problem.

The storm had knocked out power to more than 10,000 customers across metro Atlanta by early Saturday, Georgia Power said

CNN affiliate WSB reported that by 3 p.m. Saturday, more than 3,500 Georgia Power customers statewide were without power, as were 1,500 Georgia EMC customers.

BREAKING: GDOT to begin brine treatment of metro interstates/state roads @ 10am. Takes 6-8 hrs, please stay out of their way! #StormWatchOn2 pic.twitter.com/JpQMhR5GDn — Jodie Fleischer (@jodiewsb) January 7, 2017

Florida

It didn't snow in the Sunshine State, but storms forced the cancellation of the Walt Disney World Half Marathon. This was the 20th anniversary of the event, which was sold out.

PART 1: As previously shared, in an abundance of caution, WDW has cancelled all running events on 1/7/17 due to weather conditions. pic.twitter.com/xR4W8hNOrw — runDisney (@runDisney) January 7, 2017

There was a tornado watch for western Florida, around Tampa. Event organizers in Orlando delayed and then canceled the race because of strong winds and lightning in the area.

West Coast

Meanwhile, the West Coast is coming in for some unpleasant weather, too.

A series of storms are pounding northern California, with 15-20 inches of rain forecast over the next seven days, according to CNN meteorologist Haley Brink. Flooding is likely in the coming days, Brink said.

Heavy rain is expected to hit the Los Angeles area by Saturday afternoon. The rain is expected also in the Las Vegas region.

Overall, 77 million people are under a winter weather advisory or warning across the southeastern United States and in the northwest, including the Sierras in northern California.