Hurricane Erin again strengthened to a Category 4 storm overnight, prompting evacuations along parts of the East Coast.

The Atlantic basin includes the northern Atlantic Ocean, Caribbean Sea and Gulf of America, as the Gulf of Mexico is now known in the U.S. per an order from President Trump. NOAA and the National Hurricane Center are now using Gulf of America on its maps and in its advisories.

Hurricane Erin, now a powerful Category 4 storm churning in the Caribbean, is not forecast to hit land, but it will bring large waves and dangerous rip currents to the U.S. East Coast. Here's the latest forecast: