Libyan authorities are demanding investigations into whether human failings are to blame for the high death toll in the floods that struck the North African nation. The mayor of Derna, one of the hardest hit cities by the floods, Wednesday told journalists the death toll in his city “could reach 18,000 – 20,000 people, based on the extent of the damage caused by the natural disaster.” For more, VOA Africa unpacks what caused Libya's catastrophic floods.