Hurricane Sandy is a massive storm and has become a big news story around the world.

Several states have declared a state of emergency with people being evacuated and schools and airports closed.

The New York City Subway has shut for only the second time in its history and the New York Stock Exchange has closed for the first time since 9/11.

Sandy is likely to cause millions of pounds worth of damage this week in the eastern U.S. due to storm surge, severe winds, torrential rain and heavy snow.

Some are calling it a "superstorm" which could turn out to be worse than hurricane Irene which hit the east coast in 2011 and was possibly the worst in history!

Sandy, who is near record-size, is now turning north west and is expected to make land-fall in New Jersey tonight with sustained winds of 75 to 85mph and higher damaging gusts.

100-200mm (4 to 8 inches) of rainfall is expected, with a risk of widespread flooding in the New York-Philadelphia- Washington DC area.

See satellite imagery of Sandy and forecasted track of the storm.

Sandy's storm surge is also a huge threat made worse by a full moon and higher than average tides.

A near-record storm surge of 6 to 11 feet is predicted for Northern New Jersey and Long Island Sound, including New York City Harbour.

Sandy is an unusual storm for two reasons: Firstly it is following an unusual track as storms here would normally move out into the Atlantic.

Secondly, cyclones at these latitudes generally weaken as the sea temperature drops.

However, this one is clashing with a cold front and the contrast between the cold air and the tropical air within Sandy will act to fuel and energise the system.

Sometimes the remains of hurricanes reach Britain carried across the Atlantic by the Jet Stream high in the atmosphere but not always.

Sandy will eventually weaken into a depression as she moves further inland and turns north east but will still pack a punch over eastern Canada.

You can keep up to date with the progress of hurricane Sandy on the BBC weather website and NOAA's National Hurricane Centre website.

BBC News: Hurricane Sandy updates

Surfline: Surfing Hurricane Sandy

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