Storefronts are boarded up ahead of the storm in Florida.
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Florida prepares for Tropical Storm Isaac

People in southern Florida have been making final preparations for Tropical Storm Isaac, as it barrels to the US.

High winds have already caused power cuts and oil rigs are facing possible closures.

Other US states are also on alert as forecasters warn that Isaac could strengthen further.

Go to next video: Tropical storm Isaac gathers pace