Tropical Storm Erin may near Puerto Rico and the Dominican Republic before likely turning north as a hurricane, sparing the U.S.

Tropical Storm Erin is expected to begin strengthening today, and to become a hurricane by Thursday or Friday.

A strengthening tropical storm in the Atlantic is capturing attention, and for good reason. "Erin is forecast to intensify into a major hurricane by the weekend, prompting heightened alerts across the Caribbean and along the US East Coast,