Sign on SDG&E building
A view of the SDG&E building. (File photo)

A power outage left thousands of homes without electrical service in the far eastern reaches of San Diego County on Wednesday morning.

The blackout struck shortly before 8:30 a.m. Wednesday, knocking out power to a total of 2,779 San Diego Gas & Electric customers in Borrego Springs, Canebrake, and Shelter Valley.

Power was expected to be restored to all the affected addresses by midafternoon, according to SDG&E.

The cause of the outage was under investigation.