UPDATE (4:15 a.m.) - Power has been restored to all PG&E customers affected by Tuesday's power outage.
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According to PG&E's outage map, more than 4,000 customers in Santa Maria are without power.
The outage began at approximately 10:15 p.m. Tuesday, crews expect power to be fully restored around 2:30 a.m. Wednesday.
The cause of the outage is under investigation.
