Oman evacuated tens of thousands Wednesday and closed the major port of Sohar as a weakening Cyclone Gonu roared toward the Strait of Hormuz _ the world's major transport artery for Persian Gulf oil. As heavy rains lashed coastal areas, authorities closed all operations at the port of Sohar and evacuated the 11,000 workers, port spokesman Dirk Jan De Vink said. Sohar's oil refinery and petrochemical plant remained running at very low levels, with authorities considering a total shutdown, De Vink was quoted as saying by the Associated Press.