And while Puerto Rico has spent the past eight months working to rebuild its crumbling power grid, much of the repairs made after the storm are wholly inadequate for the island’s needs. Speaking with Time, power authority workers’ union Vice President Fredyson Martinez estimated that between 10 and 15% of the work down since Maria falls well below industry standards.

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“The logistics were terrible. I give it an F,” he said. “Things need to be fixed.”

On Thursday, the Puerto Rico Electric Power Authority announced that it had awarded a $500 million contract with a Florida-based infrastructure company to help continue repairs to the grid. BuT PREPA director Walt Higgans told the AP that it could take up to $8 billion to bring the entire grid up to modern standards.

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After ending their work repairing Puerto Rico’s power lines in mid-May, FEMA announced it would “continue to support” the more than 700 power generators and three mega-generators left on the island while the basic infrastructure is being fixed. But it said it would “no longer provide line restoration work for PREPA.” In other words, FEMA is partially ending its role in one of the most crucial—and tenuous—elements of the island’s electrical recovery, right as Puerto Rico heads, once more, into a summer of storms.