Hurricane Sandy is some 485 miles south-southeast of New York City packing winds of 75 mph.
This dangerous storm is expected to make landfall late Monday near the DelMarVa Peninsula and southern New Jersey.
Forecasters warn it will likely collide with a cold front from the West to spawn a superstorm that could slog along the Eastern Seaboard for days -- meaning even more wind, flooding and power outages.
Mass transit systems that typically carry close to 11 million on a weekday are canceled in New York, Washington and Philadelphia. The federal government has told its workers in Washington not to come in on Monday, and schools serving more than 2 million students are canceled up and down the East Coast.
President Barack Obama has declared states of emergency in Massachusetts, Maryland, New York and the District of Columbia.
Get complete coverage of Hurricane Sandy on CNN.com, CNN TV and CNN Mo bile.
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