A large part the Gulf of Mexico’s oil and gas production remained offline Monday as sea conditions and high winds delayed the deployment of workers and the restarting of production of hundreds of platforms that were evacuated last week ahead of Storm Lee.

After making landfall Sunday morning near Lafayette, La., and bringing torrential rains, the slow-moving storm was expected to continue to draw moisture from the Gulf as it gradually drifts north to drench the Appalachian mountains and Tennessee River valley.

The U.S. government said that about 61.4% of the oil production and 46% of the natural-gas production in the region remained shut in as of Monday.