The storm knocked out power to much of New York City. Lower Manhattan was only reconnected five days later.
This time lapse video gives a sense of the effects of Hurricane Sandy as it rolled into the U.S. northeast on Monday. Watch how the power suddenly winks out in half the buildings in the shot, the first of many outages that left more than eight million Americans without power.
The power is back on in lower Manhattan, five days after much of the city went dark.
But there are still more than two million people without power in the U.S. as a result of the storm, which caused billions of dollars in damages and has left a death toll of 107 and climbing.
To make matters worse, cooler weather is moving in, prompting officials to urge seniors and other vulnerable residents to move to shelters.
In New York City, Mayor Michael Bloomberg said 25,000 blankets were being distributed.
The region as a whole is slowly returning to life. Most schools are expected to be open Monday, although not those with extensive flooding or structural damage.
Most public transit in New York and New Jersey will be running on Monday, but commuters are plagued by lingering fuel shortages.
The federal government purchased millions of litres of gas and diesel to help alleviate the shortages, but damaged infrastructure has slowed the resupply efforts.
Long line-ups at gas stations in New York and New Jersey has been the result. At least ten people at various gas stations were arrested after tempers flared over line-jumping.
And some residents in New York's outer boroughs, like Staten Island, were resentful at being lower on the priority list than Manhattan when power was being restored.
In Canada, the storm knocked out power to more than 200,000 Canadians in Ontario, Quebec and the Maritimes.
Two people were reported killed: A Toronto woman struck by flying debris and a hydro technician working to restore power in Sarnia.
With files from the Associated Press