The Pentagon is calling back two Navy ships deemed as no longer needed in Puerto Rico following a series of hurricanes last month.

The USS Wasp, a multipurpose amphibious assault ship, and USS Oak Hill, a dock landing ship, are leaving the Caribbean and “are now proceeding on to their next missions in defense of our nation,” Pentagon spokesman Army Maj. Jamie Davis said in a statement Thursday.

Both were deployed in early September to respond to Hurricane Irma, a Category 4 storm that devastated the U.S. Virgin Islands and Puerto Rico. Hurricane Maria, another Category 4, followed shortly after.

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The Federal Emergency Management Agency (FEMA) and the Defense Department (DOD), in consultation with Puerto Rico Gov. Ricardo Rosselló have determined “that some defense department assets are no longer needed,” Davis said of the move.

“The Wasp and Oak Hill's principle contribution to the hurricane relief effort has been helicopter support,” Davis said. “FEMA and DoD have determined there are sufficient land-based helicopters and tilt rotor lift capabilities in the territories to continue helping the people of Puerto Rico and the U.S. Virgin Islands as they recover.”

The statement adds that the move is “part of the broader planning effort to transition from hurricane response to hurricane recovery.”

A Navy hospital ship, USNS Comfort, and amphibious assault ship USS Kearsarge, which deployed with the Oak Hill, will remain in Puerto Rico.

A month after Irma and Maria rolled over the island, most residents remain without power and relief efforts are ongoing.

The Senate on Tuesday passed a $36.5 billion disaster relief bill, which would provide $1.27 billion for disaster food assistance for the struggling U.S. territory.

The legislation, which would also fund a flood insurance program and aid wildfire recovery efforts in the West, is now awaiting President Trump's signature.