All commercial flights into John Wayne Airport were diverted Friday evening and outbound flights canceled due to a power outage.

The outage was reported just after 7 p.m. at the airport in an unincorporated area of Orange County surrounded by Irvine, Newport Beach and Costa Mesa off the San Diego (405) Freeway.

The airport tweeted at 9 p.m. that “All Terminal power slowly coming back online. General Aviation flights unaffected and Air Traffic Control Tower is open. The full operational stop is in effect until 7 a.m. For flights departing tomorrow, please check with your airline for more information.”

A total of 28,028 Southern California Edison customers, mostly in Irvine and Newport Beach, were affected by the outage, according to SCE’s Lois Pitter Bruce.

It was estimated most power would be restored by 6 a.m. Saturday, she said.

“Crews are working as quickly as possible to restore power, given the circumstances,” Pitter Bruce said.

The cause of the outage was a substation fire that forced it to be de-energized. The fire has been extinguished, she said.

No injuries were reported.

The Orange County Fire Authority tweeted that the vault fire was near Jamboree Road and Michelson Drive.

Irvine City Councilman Anthony Kuo tweeted that about 100 residents from an apartment on Palatine were temporarily evacuated due to smoke.

Residents were urged to exercise caution during the outage by using flashlights and treating all intersections as four-way stops, Pitter Bruce said.

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