Originally a Category 1 storm, Erin shocked forecasters by exploding into a rare Category 5 hurricane within just 24 hours. Though it has since weakened, it “remains highly dangerous,” according to experts.

The National Hurricane Center warns of “life-threatening surf and rip currents,” along with flash flooding in Puerto Rico, the Virgin Islands, and the northern Leeward Islands. Mountainous regions also face the risk of landslides and mudslides.

Meteorologists explain that rapid intensification happens when wind speeds jump more than 35 mph in a day. For Erin, “warm ocean waters and low wind shear created the perfect conditions,” making it especially hard to predict.

While not expected to make direct U.S. landfall, Erin’s massive wind field could still bring “coastal flooding, erosion, and dangerous waves.” Authorities urge residents to remain alert as the storm moves northward.

Experts compare Erin to past systems like Hurricane Milton, which caused major destruction despite staying offshore. As of August 17, Erin is a Category 3 but could regain Category 5 strength. Officials across the Caribbean and North America stress that “preparedness is essential” as communities brace for possible impacts.