1 Hurricane Sandy was strengthening and the center of the storm was forecast to
move over the coast of US Mid-Atlantic States by Monday night, the US National
Hurricane Center said on Monday.
storm's maximum sustained winds were about 85 miles per hour (140 km per hour)
and were located 615 kilometers southeast of New York City.
Its landfall is expected to
be accompanied by storm surges.
US President Barack Obama declared emergencies in
Massachusetts, Connecticut, Rhode Island, New York, New Jersey and Pennsylvania
So what are storm surges?
The storm surge of a
hurricane is not a wave, but rather it is a building of the ocean due to the
wind. The drag exerted on the ocean by the strong winds of a hurricane
literally shoves more and more water toward the coast. This results in a
piling-up effect and the height of sea level increases as the storm nears.
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