The Kuwait Petroleum Corp. also advised incoming ships to hold off on docking, the official Kuwaiti news agency KUNA reported.
A top oil official, Sheik Talal al-Khaled, said some maintenance work at refineries was halted as a precaution. But he said supplies to domestic and foreign customers will not be noticeably affected.
Kuwait normally produces 2.5 million barrels of crude oil daily.
Mohammad al-Thuwaini, acting director of operations at Kuwait International Airport, said incoming flights were diverted to neighboring countries. Visibility at the airport was down to 1,300 feet.