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.

Heavy rain is still expected across the Virgin Islands and Puerto Rico, with rainfall of up to 8 inches in some areas.

Erin is the first hurricane to develop over the Atlantic this year, and meteorologists are closely tracking its path and forecast.