Two men look out at the beach in Barahona, Dominican Republic, Thursday, Aug. 23, 2012. Puerto Rico and the U.S. Virgin Islands braced for torrential rains on Thursday as Tropical Storm Isaac whipped up waves as high as 10 feet (3 meters) in the Caribbean and threatened to become a hurricane that could take a shot at Florida just as Republicans gather for their national convention. (AP Photo/Ricardo Arduengo)
SAN JUAN, Puerto Rico (AP) -- Tropical Storm Isaac is churning toward the Dominican Republic and Haiti, after dumping heavy rain on parts of Puerto Rico.
It's threatening to strengthen into a hurricane that could take a shot at Florida just as Republicans gather for their national convention next week in Tampa. Forecasters say some forecast models have the storm moving further to the west, but that it's too soon to tell.
By late afternoon, the storm was about 180 miles south-southwest of San Juan, with top sustained winds of 40 miles an hour. It was moving to the west-northwest at 16 miles an hour.
The prime minister in Haiti urged people to avoid crossing rivers and to tape their windows. And he said they should ask relatives overseas to wire money so they can stock up on food and water.
About 400,000 people in Haiti remain in settlement camps that are clusters of shacks and tarps as a result of the country's 2010 earthquake.
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