Offshore, the strong waves caused a freighter to run aground near Palm Beach, and nine people became stranded in houseboats near a mangrove island in Biscayne Bay. Another cargo ship, the "Panamanian", ran aground within Lake Worth Inlet. At Key Largo, a sailboat was blown out of the water onto an adjacent neighborhood. Elsewhere in Key Largo, homes were unroofed by the strong winds, with other buildings damaged by flying debris. Water forced into the Miami River caused it to overflow its banks and spread inland for several city blocks in Miami. In the Miami area, Betsy caused the most severe seawater inundation since a major hurricane struck in 1926; this record was attributed to the highest storm surge reported in as many years. A section of State Road A1A, which runs adjacent to Miami and the nearby beach, was blocked by sand dunes piled inland by the strong winds. The high tide also washed out a some portions of the road between Fort Lauderdale and Pompano Beach.