The move was to ensure the safety of employees and the operation of the refinery , which is jointly owned by Hess Corp. and Venezuela 's state oil company . NEW : Omar becomes Category 3 hurricane as it approaches Leeward Islands . U.S. Coast Guard shuts down Caribbean , where refinery is . Parts of Leeward Islands could see 74 mph of rain , mudslides , flash floods . Category is 15th named storm of hurricane season , which ends hurricane season .
NEW : Omar becomes Category 3 hurricane as it approaches Leeward Islands . U.S. Coast Guard shuts down Caribbean , where refinery is . Parts of Leeward Islands could see 74 mph of rain , mudslides , flash floods . Category is 15th named storm of hurricane season , which ends hurricane season .