The outage happened in East Massapequa around 7:30 a.m., Monday, Aug. 22, causing outages and some traffic difficulties with down traffic signals.
According to PSEG officials, the majority of customers have had power restored with the rest expected by around 9:30 a.m. Monday.
As of 8:55 a.m. PSEG was reporting some 660 customers still without power.
The company is investigating what caused the outage, said Elizabeth Flagler, PSEG spokeswoman.
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