A beach house on the North Carolina coast collapsed into the Atlantic Ocean, prompting the National Park Service to issue a warning to visitors on Wednesday for debris. A news release shows the warning for the Cape Hatteras National Seashore targeted the beach and the ocean between the villages of Rodanthe and Salvo. The bulk of the debris is at the site of the collapsed house in Rodanthe. But the news release said smaller amounts of debris have been spotted as far south as off-road vehicle ramp 23, more than 7 miles away.