More than 2,200 customers were suddenly left without power late Thursday afternoon in Canyon Country.
Shortly before 6:30 p.m., Southern California Edison reported at least 2,238 of its customers were affected by the outage.
The notice posted on the utility’s website indicated workers were still trying to determine what caused the power outage.
The outage comes the day after at least 3,900 people were left without electricity Wednesday afternoon as a result of three outages reported by Southern California Edison.
About 1,000 residents had power restored around 7:30 p.m., according to Edison officials. An estimated 21 customers were still without power as of 10 p.m. Thursday and crews estimated service would return around 11:30 p.m.
“Repairs are being made to underground equipment,” which can take longer to do, said Edison spokesperson Jim Hanggi. “But crews are working hard to restore power as quickly and safely as possible.”