Hurricane Erin briefly strengthened into a Category 5 storm. It is not expected to make a direct hit on the U.S. but will create dangerous surf.

Hurricane Erin has strengthened back into a Category 4 hurricane as of Monday morning. Over the weekend, Erin underwent a process called rapid intensification, causing it to go from a category 1 hurricane to a category 5 hurricane within a roughly 24 hours.

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.