President Barack Obama, neck-and-neck in opinion polls with Republican rival Mitt Romney three days before the general election, told emergency response officials to cut through government "red tape" and work without delay to help ravaged areas return to normal as quickly as possible.
The power restorations relit the skyline in Lower Manhattan for the first time in nearly a week and allowed 80% of the New York City subway service to resume, but more than a million homes and businesses still lacked power, down from 3.5-million on Friday.
The power failures combined with a heating oil shortage meant some homes could go cold as unseasonably frigid weather sets in. Forecasters saw temperatures dipping to around three degrees Celsius on Saturday night with freezing temperatures expected next week.
Tom Clark (43) and family members were burning wood in a steel drum on their front yard. Clark said the family and their dogs planned to go stay at his mother-in-law's heated house. George Harrison (39) and his wife had masks hanging around their necks that they had used to shield them from the stench of raw sewage when they entered their flood-hit house.
The weather forecast remains bleak. An aggressive early-season "Nor'easter" storm was expected to hit the battered New England coast next week with strong winds and heavy rain.
New York City mayor Michael Bloomberg on Saturday urged those without power and heat — especially the elderly and other vulnerable groups — to head to shelters where they could keep warm and receive food.
"Right now it's starting to really get cold," he said.
Bloomberg criticises utility
"There's no heating oil around," said Vincent Savino, the president of Statewide Oil and Heating, which usually supplies 2 000 buildings across New York City. "I don't know how much fuel we have left: maybe a day or two."
The post-storm chaos also threatened to jumble Tuesday's election, with Obama and Republican challenger Mitt Romney locked in a tight race.
Sandy killed 69 people in the Caribbean before turning north and hammering the US eastern seaboard on Monday with 130km/h winds and a record surge of seawater that swallowed oceanside communities in New Jersey and New York, and flooded streets and subway tunnels in New York City.
Bloomberg praised utility Consolidated Edison for making significant progress in restoring power to customers, but warned New Yorkers that it would be days before everyone had electricity again and fuel shortages ended.
But he had sharp words for the Long Island Power Authority, LIPA, which he said "has not acted aggressively enough" in its power restoration efforts, above all in the Rockaways, a beachfront community in the borough of Queens.
"I was there [at the Jersey Shore] yesterday and I will tell you, it looked like we had been bombed," Christie said "There are homes in Bay Head on the beach that had been driven by the storm surge into the houses across the street."
Obama won praise for the federal storm response but the devastation was so widespread that angry storm victims continued to appear on television days after landfall. The storm damaged or destroyed thousands of homes and displaced voters, forcing election officials to improvise at early polling stations.
Christie ordered county clerks in New Jersey to open on Saturday and Sunday to accommodate early voters and ensure a "full, fair and transparent open voting process".
New Jersey authorities also took the uncommon step of declaring that any voter displaced from their home by superstorm Sandy would be designated an overseas voter, which allows them to submit an absentee vote by fax or email.
Tight fuel supplies have tested the patience of drivers — fistfights have broken out in kilometre-long lines of cars — but a reopened New York harbour meant fuel was reaching terminals.
To alleviate one of the country's worst fuel chain disruptions since the energy shortage in the 1970s, about 36-million litres of fuel and other petroleum products have been delivered since Friday, with much more expected this weekend, New York Governor Andrew Cuomo said.
Running on empty
Cuomo also announced the Defence Department would set up five mobile fuel stations in the metropolitan area, providing people with up to 45 litres of free fuel. New York State Division of Military and Naval Affairs said the fuel was for personnel and first responder vehicles, which have priority.
At least 1 000 drivers queued up at the Freeport Armory in Long Island, only to be told the fuel would not arrive for at least eight hours more, one driver said.
"There's just so many people getting very frustrated. People don't know what to do," said Lauren Popkoff (49) a history teacher who had been in line for four hours.
Bloomberg said the fuel shortages would be easing soon.
According to the US Energy Informational Administration the number of dry stations in the New York metropolitan area plunged to 38% on Saturday from 67% on Friday. The US Department of Energy confirmed on Saturday that most filling stations in the metro area had fuel.
New York City's overstretched police got a break with the cancellation of Sunday's marathon, a popular annual race that became a lightning rod for critics who said it would divert resources.
People are also worried about crime. In one hard-hit Queens neighbourhood, a garage full of debris stood open with a sign next to it reading: "LOOTERS WILL BE CRUCIFIED — GOD HELP YOU."
The Obama administration directed the purchase of up to 45-million litres of fuel and 45-million litres of diesel, to be trucked to New York and New Jersey. It also waved rules barring foreign-flagged ships from making U.S. domestic fuel transfers.
Consolidated Edison, battling what it called the worst natural disaster in the company's 180-year history, restored electricity to many Manhattan neighbourhoods, though some 11 000 customers on the island were without service.