Areas affected included Thatchfield, The Reeds, Rooihuiskraal, Heuweloord, Amberfield and Wierdapark.
It was not immediately known when power would be restored.
“Currently, the city is occupying itself with assessment of infrastructural needs. This will enable the city to commit the necessary resources and give the estimated power restoration time.
“The immediate focus of the city now will be to ensure provision and restoration of power supply to the affected residents and businesses. It is only after the affected customers have electricity and infrastructure repairs done that we will be able to establish and disclose the cost of damages,” said Mashigo, adding that the city apologised for the inconvenience caused by the outage.