In Washington, President Barack Obama promised the government would "respond big and respond fast" after the storm hits.
"My message to the governors as well as to the mayors is anything they need, we will be there, and we will cut through red tape. We are not going to get bogged down with a lot of rules," he said.
He also pleaded for neighborliness: "In times like this, one of the things that Americans do is we pull together and we help out one another And so, there may be elderly populations in your area. Check on your neighbor, check on your friend. Make sure that they are prepared. If we do, then we're going to get through this storm just fine."
The storm forced the president and Mitt Romney to rearrange their campaign schedules in the crucial closing days of the presidential race. And early voting on Monday in Maryland and the District of Columbia was canceled.
Despite the dire warnings, some people were refusing to budge.
Jonas Clark of Manchester Township, N.J. â¿¿ right in the area where Sandy was projected to come ashore â¿¿ stood outside a convenience store, calmly sipping a coffee and wondering why people were working themselves "into a tizzy."
"I've seen a lot of major storms in my time, and there's nothing you can do but take reasonable precautions and ride out things the best you can," said Clark, 73. "Nature's going to what it's going to do. It's great that there's so much information out there about what you can do to protect yourself and your home, but it all boils down basically to 'use your common sense.'"
In New Jersey, Denise Faulkner and her boyfriend showed up at the Atlantic City Convention Center with her 7-month-old daughter and two sons, ages 3 and 12, thinking there was a shelter there. She was dismayed to learn that it was just a gathering point for buses to somewhere else. Last year, they were out of their home for two days because of Hurricane Irene.