Private power company LUMA Energy said it could take two to three days to restore service to 90% of customers.

Crews were reported to be making progress restoring power to Puerto Rico after an island-wide blackout that affected the main ...

It was not immediately clear why every generating plant on the island went offline Wednesday. Puerto Rico has a history of ...

Puerto Rico's hurricane-battered power grid has suffered compounding crises including hurricanes and financial problems.