Rafael was moving west across the Gulf of Mexico Friday morning as the first major hurricane in the Gulf of Mexico in November for almost 40 years, bringing the threat of life-threatening conditions to the southern United States coastline.

Over 22% of crude oil production and 9% of natural gas output in the U.S. Gulf of Mexico was shut in response to Hurricane Rafael, the U.S. Bureau of Safety and Environmental Enforcement said on Thursday.

There have already been storm impacts in the southeastern United States after Hurricane Rafael made landfall in Cuba. See where the storm may go this weekend.