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Storm Isaac to be downgraded

Tropical storm Isaac is forecast to become a tropical depression by the National Hurricane Centre later today. The Mayor of New Orleans has enforced a dawn-to-dusk curfew as Isaac continues to lash the city.

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Dozens of homes submerged south of New Orleans

The area of Plaquemines lies to the south of New Orleans. Recent images show that dozens of homes have been submerged.

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