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Carlos Eduardo Perez loads water into the trunk of his car as he prepares for Tropical Storm Isaac, Thursday, Aug. 23, 2012 in Hialeah, Fla. The center of Tropical Storm Isaac is moving west-northwest south of Puerto Rico. A hurricane warning is in effect for the south coast of Dominican Republic from Isla Saona westward to the Haiti-Dominican Republic. (AP Photo/Alan Diaz)

Associated Press
Carlos Eduardo Perez loads water into the trunk of his car as he prepares for Tropical Storm Isaac, Thursday, Aug. 23, 2012 in Hialeah, Fla. The center of Tropical Storm Isaac is moving west-northwest south of Puerto Rico. A hurricane warning is in effect for the south coast of Dominican Republic from Isla Saona westward to the Haiti-Dominican Republic. (AP Photo/Alan Diaz)
Carlos Eduardo Perez loads water into the trunk of his car as he prepares for Tropical Storm Isaac, Thursday, Aug. 23, 2012 in Hialeah, Fla. The center of Tropical Storm Isaac is moving west-northwest south of Puerto Rico. A hurricane warning is in effect for the south coast of Dominican Republic from Isla Saona westward to the Haiti-Dominican Republic. (AP Photo/Alan Diaz)
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