The east coast of the United States is preparing for Hurricane Sandy.
States of emergency were declared in Maryland, New York, Pennsylvania, Virginia, Washington DC and a coastal county in North Carolina on Saturday.
Sandy is expected to become a super storm when it merges with a cold front moving from Canada.
It is predicted to arrive late on Monday, after killing 41 people in the Carribean.
At 8am EDT, Sandy was about 539km south-east of Charleston in South Carolina, according to the National Hurricane Center.
Forecasters say it is similar to another storm in late October in 1991, when several weather systems, including a hurricane, combined along the US Atlantic coast.
