Cleanup crews hoped to resume skimming and beach cleanup operations in the Gulf on Friday. Rough seas from Hurricane Alex had hampered efforts for the previous two days.

Although no beaches along the Gulf are closed, swimming and health advisories have been posted along the coast.

The backwash of the storm further damaged Louisiana’s marshlands and barrier islands when waves rolled over the booms designed to protect the wetlands. The primary affected area is around the mouth of the Mississippi River in the southeast region of Louisiana, according to tourism officials.

The oil slick is now estimated to cover an area the size of the state of Tennessee, according to the U.S. Coast Guard.

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