A colossal power outage has wiped out power to Puerto Rico’s capital San Juan. The cause of the huge issue is a primary transmission line failure according to Fernando Padilla, an official with the Puerto Rico Electric Power Authority.

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Power generation was at over 40% of capacity yet plummeted to 18% on Wednesday. A majority of Puerto Rico has been powerless since Hurricane Maria ravaged the island on September 20.

The downed power line was repaired previously by Whitefish Energy, a Montana firm recently under fire for a $300 million contract to restore power on the island. The deal was later canceled by the Puerto Rico government.