ATLANTIC CITY, N.J. -- Forecasters say Hurricane Sandy is speeding up and should make landfall early Monday evening in southern New Jersey.
The National Hurricane Center said the storm's top sustained winds were holding at near 90 mph, with higher gusts. The storm's center was about 110 miles southeast of Atlantic City, N.J., and headed northwest at 28 miles per hour.
Sandy is on track to collide with a wintry storm moving in from the west and cold air streaming down from the Arctic.
The mayor of New York warned Monday morning that conditions were "deteriorating very rapidly" and people needed to get out of the storm's path as quickly as possible.
Subways and schools were closed, the floor of the New York Stock Exchange was deserted, and thousands fled inland.
Forecasters expected the monster hurricane to make a westward lurch and aim for New Jersey, blowing ashore Monday night or early Tuesday and combining with two other weather systems to create an epic superstorm.
Interactive: Superstorm heads to the Northeast
USGS Tidal Surge Map
'WORST CASE SCENARIO'
"This is the worst-case scenario," said Louis Uccellini, environmental prediction chief for the National Oceanic and Atmospheric Administration.
Because the storm is so big, with tropical storm-force winds extending almost 500 miles from its center, it could upend daily life for big cities and small towns alike across the Northeast — including Washington, Baltimore, Philadelphia, New York and Boston — and as far west as the Great Lakes. Up to 3 feet of snow was forecast for the West Virginia mountains.
Millions of people in the storm's path stayed home from work. Subways, buses and trains shut down, and more than 7,000 flights in and out of the East were canceled, snarling travel around the globe. Hundreds of thousands of people were under orders to flee the coast, including 375,000 in lower Manhattan and other parts of New York City, but authorities warned that the time to get out was short or already past.
"I think this one's going to do us in," said Mark Palazzolo, who boarded up his bait-and-tackle shop in Point Pleasant Beach, N.J., with the same wood he used in past storms, crossing out the names of Hurricanes Isaac and Irene and spray-painting "Sandy" next to them.
"I got a call from a friend of mine from Florida last night who said, 'Mark, get out! If it's not the storm, it'll be the aftermath. People are going to be fighting in the streets over gasoline and food.'"
OBAMA DECLARES STORM EMERGENCIES
President Barack Obama declared emergencies in Massachusetts, Connecticut, Rhode Island, New York, New Jersey and Pennsylvania, authorizing federal relief work to begin well ahead of time. He promised the government would "respond big and respond fast" after the storm hits.
Sandy, a Category 1 hurricane with sustained winds of 85 mph early Monday, was blamed for 65 deaths in the Caribbean before it began traveling northward, parallel to the Eastern Seaboard.
About 90 miles off Cape Hatteras, N.C., the Coast Guard rescued 14 crew members by helicopter from a replica of the 18th-century tall ship made famous in the movie "Mutiny on the Bounty." The Coast Guard searched for two other crew members.
The rescued had donned survival suits and life jackets and boarded two lifeboats after the ship began taking on water. They were plucked from 18-foot seas just before sunrise.
Maryland Gov. Martin O'Malley said a fishing pier in the beach resort of Ocean City, not far from a popular boardwalk and amusement park, was "half-gone." The area had been ordered evacuated on Sunday.
Water was already a foot deep on the streets of Lindenhurst, N.Y., along the southern edge of Long Island, and the canals around the island's Great South Bay were bulging two hours before high tide. Gale-force winds blew overnight over coastal North Carolina, southeastern Virginia, the Delmarva Peninsula and coastal New Jersey.
DAMAGING STORM SURGE EXPECTED IN NYC, LONG ISLAND
Forecasters warned that New York City and Long Island could be on the dangerous northeastern edge of the tempest and bear the worst of the storm surge — a wall of seawater up to 11 feet high that could swamp lower Manhattan, flood subway tunnels and cripple the network of electrical and communications lines that are vital to the nation's financial center.
The major American stock exchanges closed for the day, the first unplanned shutdown since the Sept. 11 attacks in 2001. The floor of the NYSE, typically bustling with traders on a Monday morning, fell within the city's mandatory evacuation zone. The United Nations canceled all meetings at its New York headquarters.
New York called off school for the city's 1.1 million students, and the more than 5 million people who depend on its transit network every day were left without a way to get around. Most planned to stay inside anyway.
New Jersey Gov. Chris Christie was typically blunt: "Don't be stupid. Get out."
The storm bore down barely a week before the presidential election. Wary of being seen as putting political pursuits ahead of public safety, Obama and Republican nominee Mitt Romney reshuffled their campaign plans.
In Virginia, one of the most competitive states, election officials eased absentee voting requirements for those affected by the storm. Three other closely contested states, New Hampshire, North Carolina and Ohio, were within Sandy's reach. Early voting was canceled Monday in Maryland and Washington, D.C., both reliably Democratic.
SANDY TO COLLIDE WITH WINTER STORM
After hooking inland, Sandy was expected to collide with a wintry storm moving in from the west and cold air streaming down from the Arctic. Forecasters said the combination could bring close to a foot of rain in places, a potentially lethal storm surge of 4 to 11 feet across much of the region, and punishing winds that could cause widespread power outages that last for days.
Craig Fugate, chief of the Federal Emergency Management Agency, said FEMA teams were deployed from North Carolina to Maine and as far inland as West Virginia, bringing generators and basic supplies that will be needed in the storm's aftermath.
Pennsylvania's largest utilities brought in hundreds of line-repair and tree-trimming crews. In New Jersey, where utilities were widely criticized last year for slow responses after the remnants of storms Irene and Lee, authorities promised a better performance. Hundreds of homes and businesses were already without electricity early Monday.