In the South, authorities still were not sure how much damage had been done. North Carolina Gov. Beverly Perdue said some parts of her state were unreachable. TV footage showed downed trees, toppled utility poles and power lines and mangled awnings.

Virginia Gov. Bob McDonnell had initially warned that Irene could be a "catastrophic" monster with record storm surges of up to 8 feet. But the mayor Virginia Beach, Va., suggested on Twitter that the damage was not as bad as feared, as did the mayor of Ocean City, Md.

One of two nuclear reactors at Calvert Cliffs, Md., automatically went offline because of high winds. Constellation Energy Nuclear Group said the plant was safe.

In New York, some cabs were up to their wheel wells in water, and water rushed over a marina near the New York Mercantile Exchange, where gold and oil are traded. But the flooding was not extensive.

"Whether we dodged a bullet or you look at it and said, 'God smiled on us,' the bottom line is, I'm happy to report, there do not appear to be any deaths attributable to the storm," Bloomberg said.

New York officials could not pinpoint when the trains would run again but warned that the Monday commute would be rough. The New York subway carries 5 million riders on an average weekday.

The casinos of Atlantic City, N.J., planned to reopen Monday at noon after state officials checked the integrity of the games, made sure the surveillance cameras work, and brought cash back into the cages under state supervision. All 11 casinos shut down for the storm, only the third time that has happened.

In Philadelphia, the mayor lifted the city's first state of emergency since 1986. The storm was blamed for the collapses of seven buildings, but no one was hurt and everyone was accounted for. People kept their eyes on the rivers. The Schuylkill was expected to reach 15 feet.

The 19 deaths attributed to the storm included six in North Carolina, four in Virginia, four in Pennsylvania, two in New York, two in rough surf in Florida and one each in Connecticut, Maryland and New Jersey.

In an early estimate, consulting firm Kinetic Analysis Corp. figured total losses from the storm at $7 billion, with insured losses of $2 billion to $3 billion. The storm will take a bite out of Labor Day tourist business from the Outer Banks to the Jersey Shore to Cape Cod.

Irene was the first hurricane to make landfall in the continental United States since 2008, and came almost six years to the day after Katrina ravaged New Orleans on Aug. 29, 2005.

As the East Coast cleans up, it can't afford to get too comfortable. Off the coast of Africa is a batch of clouds that computer models say will probably threaten the East Coast 10 days from now, Mayfield said. The hurricane center gave it a 40 percent chance of becoming a named storm over the next two days.

"Folks on the East Coast are going to get very nervous again," Mayfield said.