
Tropical Storm Dorian officially became Hurricane Dorian on Wednesday, its sustained winds topping 75 mph as it bore down on Puerto Rico and St. Thomas in the Virgin Islands. Forecasters are now warning the storm will strengthen into a dangerous Category 3 hurricane as it nears the U.S. mainland.
Puerto Rico, Vieques and the Virgin Islands are under alert, with hurricane conditions expected as the storm passes through that area. Dorian is currently crossing over St. Thomas, the National Hurricane Center says in its 2 p.m. ET update. The storm is moving toward the northwest at around 13 mph.