2 days after people; The 30 sugar refineries in the United States are now empty of humans. The process of creating sugar produced clouds of sugar dust which is flammable. Now the refineries ventilation systems have shut down and the sugar dust clouds begin to build up static charges. Finally a spark ignites the sugar dust in a conveyor belt and the sugar refinery erupts in flame. The fire travels to the refinery’s storage silos and when the fire reaches 700 degrees the silos explode.