Northern Puerto Rico Plunges Back Into Darkness After Power Plant Explosion

February 12, 2018

An explosion and fire at an electric substation threw much of northern Puerto Rico into darkness late Sunday in a setback for the U.S. territory's efforts to fully restore power more than five months after Hurricane Maria started the longest blackout in U.S. history. The island's Electric Power Authority said several municipalities were without power, including parts of the capital, San Juan, but they were optimistic it could be restored within a day as they worked to repair a substation that controls voltage.

The blast illustrated the challenges of restoring a power grid that was already crumbling before it was devastated by the Category 4 hurricane.

Officials said the fire was quickly extinguished and that the explosion knocked two other substations offline.

Carlos Monroig, an administrator for the press office of the Electric Power Authority, told CBS News that the cause of the explosion was due to mechanical failure.

"We are trying to restore that as quickly as possible," the company said.

Monroig told CBS News that power should be restored by Monday night at the latest.

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