The latest image of Hurricane Sandy Photo: National Hurricane Center
More than 375,000 people are being evacuated from their homes in New York City ahead of the arrival of Hurricane Sandy.
President Obama said the storm was "serious and big" and he urged resident on the east coast of the US to take the warnings "very seriously".
Speaking at the headquarters of the Federal Emergency Management Agency, he said he was not anticipating that the storm would affect voting in the forthcoming US presidential election.
The Mayor of New York Michael Bloomberg has ordered mandatory evacuations for low-lying areas that are expected to be worst hit by storm-surge flooding.
The mandatory evacuation zone covers City Island to Coney Island to Battery Park City.
Bloomberg said during a press conference that he has ordered public schools to close on Monday. Street cleaning and parking meter rules will also be suspended on Monday.
New York Governor Andrew M. Cuomo has said that subway, bus, and railway services in New York will close from 7pm local time (11pm GMT) tonight.
All city parks, playgrounds and beaches will be closed from 5pm local time (9pm GMT) will also be closed.
The National Hurricane Center said Hurricane Sandy is expected to bring life-threatening storm surge flooding to the Mid-Atlantic coast including Long Island Sound and New York Harbour.
Winds are expected to be near hurricane force when Sandy makes landfall some time on Monday.
Its latest 'forecast cone' shows the likely path of the hurricane: The latest forecast showing the probably path of Hurricane Sandy Credit: National Hurricane Center
Daybreak's New York Correspondent Lucy Watson has tweeted this photo of a New York supermarket which has almost run out of bottled water.
Residents have been advised to stock up on vital supplies ahead of Sandy's arrival. A supermarket aisle in New York Credit: ITV News/Lucy Watson
The New York Stock Exchange will open on Monday morning as usual, a spokesman for the stock exchange said.
Hurricane Sandy has caused havoc in the Caribbean islands of Cuba and the Bahamas.
Sandy's storm surge a huge threat This afternoon's 3:30 pm EDT H*Wind analysis from NOAA's Hurricane Research Division put the destructive potential of Sandy's winds at a modest 2.8 on a scale of 0 to 6. However, the destructive potential of the storm surge was record high: 5.8 on a scale of 0 to 6. This is a higher destructive potential than any hurricane observed since 1969, including Category 5 storms like Katrina, Rita, Wilma, Camille, and Andrew.
-Jeff Masters
If you have a barometer at home, take a look at it - it doesn't go that low. If that occurs, this storm will bring the lowest barometric pressure ever recorded on the East Coast.