Severe flooding and landslides have devastated central Vietnam, causing at least 43 deaths and leaving nine people missing.The coastal cities of Nha Trang and Hoi An, the latter a UNESCO World Heritage site, are among the most affected areas, with entire neighborhoods in Nha Trang now underwater.Rescue operations continue amid severe weather, with military troops and police mobilized to set up emergency shelters and search for missing persons by helicopter.