Power was restored to more than 98% of customers Friday after an island-wide blackout hit Puerto Rico earlier this week, authorities said.

More than 1.45 million customers had electricity less than 48 hours after the outage hit, according to Luma Energy, which oversees the transmission and distribution of power on the island.

Luma warned that “some customers may continue to experience temporary outages due to limited generation.”

Gov. Jenniffer González said that all those affected by the blackout had power restored, and that the more than 21,400 customers without electricity on Friday was a result of other unidentified issues.

Nurys Perez moves a generator into place to power her beauty salon during a blackout in San Juan, Puerto Rico, Thursday, April 17, 2025.  (AP Photo/Alejandro Granadillo)

“Obviously, Luma still has work to do,” she said. “It is a shame for our people … that we have such an insufficient, mediocre system.”

Normally, a couple thousand customers are temporarily without power every week in Puerto Rico for various reasons.

González noted that more than 98% of customers also had water.

“We have overcome, thank God, a great crisis this week,” she said.

The blackout that hit Wednesday afternoon occurred after a transmission line failed and then caused generators across the island to protectively shut down, officials have said. It also left more than 400,000 customers without water at the time.

It wasn’t immediately clear what caused the failure, although authorities are investigating whether a series of breakers failed or if overgrown vegetation is to blame.

González said she expected to receive a preliminary report in upcoming days.

It’s the second massive blackout to hit Puerto Rico in less than four months. The previous one happened on New Year’s Eve.