IRVINE ( — Authorities say electricity has been fully restored to Southern California Edison (SCE) customers impacted by an underground vault explosion in Irvine.

Nancy Rodriguez Casanova of SCE said the agency restored power to the final customer who was impacted around 5:30 a.m. Sunday.

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About 2,915 customers had been left in the dark after the blast ripped through an underground electrical vault at Culver and Michelson drives on Saturday afternoon.

The explosion also caused a driver’s airbag to deploy but that motorist was uninjured.

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In the hours following the explosion, authorities had restored electricity to a majority of the affected customers.

The cause of the blast remains under investigation.

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