After exploding in strength at a historic rate this weekend, Hurricane Erin is now a sprawling Category 4 storm churning in the Atlantic. The storm’s enormous footprint is becoming the biggest concern as it threatens to drive life-threatening rip currents and towering waves toward the eastern US coastline and Bermuda.

Hurricane Erin was downgraded to Category 3 early morning on Sunday, Aug. 17, per the National Hurricane Center. However, the tropical storm is still expected to bring 'life-threatening' conditions to the beaches along much of the east coast of the U.

Hurricane Erin strengthened back to a Category 4 storm after weakening slightly, with the National Hurricane Center reporting maximum sustained winds of 130 mph.