Containers are piling up on the docks in San Juan because there’s no way to drive them to where they’re needed.

Distributors for big-box companies and smaller retailers are unloading 4,000 20-foot containers full of necessities like food, water and soap this week at a dock in Puerto Rico’s capital operated by Crowley Maritime Corp. In the past few days, Tote Maritime’s terminal has taken the equivalent of almost 3,000. Even with moves to ease shipping to the island, like the Trump administration’s waiver of the Jones Act on Thursday, the facilities have become choke points in the effort to aid survivors of Hurricane Maria.

“There are plenty of ships and plenty of cargo to come into the island,” said Mark Miller, a spokesman for Crowley, based in Jacksonville, Florida. “From there, that’s where the supply chain breaks down — getting the goods from the port to the people on the island who need them.”

The roads are flooded and damaged. Truck drivers are busy recovering from the storm.

The buildings that would receive supplies are destroyed and without electricity, Miller said. The transport companies that have staff available and diesel on hand encounter downed poles and power lines while navigating 80,000-pound tractor-trailers on delicate washed-out roads.

“It’s one thing to move a little car through there,” Miller said. “It’s another to move a semi truck.”

So in short it’s still an emergency situation.