Dangerous rip currents are expected along the U.S. East Coast as Hurricane Erin grows in size this week, the National Hurricane Center said Tuesday.

Hurricane Erin is beginning its upward movement along Atlantic coast, expected to be a few hundred miles off the coast of North Carolina by Aug. 21.

Hurricane Erin became this season’s first hurricane on Friday and first major hurricane on Saturday, peaking at a Category 5 hurricane with peak sustained winds of 160 mph, gusts up to 195 mph, and a minimum central pressure of 915 mb.