DANVILLE (CBS SF/BCN) — Nearly 3,300 PG&E customers in Danville and San Ramon were without power Wednesday morning as the utility sought to determine the cause of the outage.

According to PG&E and the Danville Police Department, roughly 3,298 Danville customers were without power as of 8:30 a.m.

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Police warned local residents that traffic signals along Sycamore Valley Road may be compromised. If the lights were out, motorists should treat them as four-way stop signs.

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PG&E crews were on scene trying to determine the cause of the power outage.

Residents can visit PG&E’s power outage map at https://pgealerts.alerts.pge.com/outages/map/ for updated information.

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According to the utility, power was expected to be restored just before 2 p.m.