UPDATE (9:30 p.m.) - A second large power outage left part of San Luis Obispo in the dark on Monday evening.
The weather-related outage started at about 8:50 p.m.
According to PG&E, nearly 3,500 customers were without power.
It was affecting the area along Los Osos Valley Road from S. Higuera Street to Foothill Boulevard.
There was no estimated time of restoration.
A few other scattered outages were reported across the city, but a previously reported outage that started just before 4 p.m. had been restored.
In Santa Margarita, just about 100 customers were still without power as of 9:30 p.m., and power was out for more than 300 customers in northeastern SLO County.
Multiple smaller outages were also affecting people in the Atascadero, Paso Robles, Cambria, Arroyo Grande, Santa Maria, and Lompoc areas.
PG&E on Monday said it had approximately 400 power restoration crews pre-staged across California to respond to outages resulting from the storm.
To check the latest outages in your area, visit the PG&E Outage Center online.
(4:30 p.m.) - Power outages have left nearly 4,500 PG&E customers without power in San Luis Obispo County on Monday.
Three major power outages were reported across the county, in San Luis Obispo, near Santa Margarita and northeast of Shandon.
In parts of San Luis Obispo, power went out at 3:59 p.m., affecting 2,798 PG&E customers. Officials have not yet said when power may be restored to the area.
785 PG&E customers lost power at about 12:50 p.m. on Monday near Santa Margarita. Officials say that power should return to the area by 10 p.m. on Monday night.
913 customers were left without power during an outage that began at 2:13 p.m. on Monday. PG&E's outage map shows the affected area near Hwy 41 northeast of Shandon, along Cholame Creek. PG&E officials have not shared an estimated time when power will be restored to the area.
Officials say the outages in San Luis Obispo and northeast of Shandon were caused by the storm.
The outage near Santa Margarita was reportedly caused by an equipment issue.
This is a developing story. Check back here for updates.