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With a fearsome superstorm threatening the Eastern Seaboard, several governors are declaring states of emergency and urging coastal residents to move inland.

Among them is New Jersey Gov. Chris Christie. He's ordered the evacuations of all Atlantic City casinos and the state's barrier islands by tomorrow afternoon. He's also closing state parks.

North Carolina Gov. Beverly Purdue has declared a state of emergency for some coastal areas. There's concern that a temporary bridge built after Hurricane Irene last year could be washed out again, cutting off Hatteras Island.

New York City is considering whether to shut down any of its public transportation, as it did during Irene.

Airlines are predicting cancellations and waiving change fees for passengers who want to reschedule.

The danger is not just from Hurricane Sandy, which is expected to come ashore early Tuesday somewhere around Delaware. As it moves inland, forecasters say Sandy will run into two winter weather systems, potentially creating one huge storm. An 800-mile wide swath of the country could see 50 mph winds.

Torrential rains are also predicted, and in some places, snow.