The effects of the storm called "Frankenstorm" - as Sandy hits two winter weather systems -- could hit as early as Sunday. The rare hybrid storm could cause havoc over 800 miles from the East Coast to the Great Lakes, with snow, wind and flooding.
States of emergency: Connecticut, Massachusetts, New York, New Jersey, Maryland, Virginia, District of Columbia, Pennsylvania and Maine have declared states of emergency.
Plans: New Jersey evacuated its barrier islands, all Atlantic City casinos, New York was considering shutting down the subways to avoid flooding and half a dozen states warned residents to prepare for several days of lost power.
Airlines encouraged people with flights scheduled in the next few days to change their plans, waving cancellation fees.
The Caribbean death toll rose to again sharply on Saturday, even as the storm swirled away toward the U.S. East Coast. Officials said at least 58 people.