The village of Ocracoke is located around a small sheltered harbor called Silver Lake, with a second smaller residential area built around a series of man-made canals called Oyster Creek. The village is located at the widest point of the island, protected from the Atlantic Ocean by sand dunes and a salt marsh. The average height of the island is less than above sea level, and many of the buildings on the island are built on pilings to lift them off the ground. Flooding is a risk during both hurricanes and large storms. Ocracoke Light is situated near Silver Lake and has remained in continuous operation since 1823.