At least 11,300 are now believed to have died after torrents of water ripped through eastern Libya — a devastating toll that could largely have been avoided, global officials said Thursday. Marie el-Drese, secretary general of the Libyan Red Crescent, told The Associated Press by phone that a further 10,100 had been reported missing in the ruined city of Derna. Earlier, city officials said the death toll could reach 20,000. As rescuers searched underwater and under rubble, fears grew that rotting bodies could lead to a deadly outbreak of disease. “The situation is very large and surprising for the city of Derna.