Wall Street Journal: Lisa Schaeffer spent last Saturday afternoon cleaning up after Tropical Storm Hanna. Her 44-year-old white cottage stood intact — five yards from the sea. “There used to be a street in front of our house, and then a row of cottages,” Mrs. Schaeffer says. “We’re fortunate we’re still here.” Alyssa Abkowitz Sandbags piled in Ocean Isle Beach, N.C., are a long shot against erosion. For years, local residents and the city of Ocean Isle, on the border of South and North …