Firefighters try to extinguish a fire at a oil refinery in Puerto La Cruz August 11, 2013. Lightning set fire to a storage tank at Venezuela's Puerto La Cruz oil refinery on Sunday, the president said, and residents were moved out of the immediate area while local media showed images of thick black smoke rising from the facility. Thunderstorms this weekend have drenched much of the South American OPEC nation, which has suffered repeated accidents at its oil refineries in recent years. Lightning bolts ignited two storage tanks at a different refinery just last year. [Photo/Agencies]