A fault involving at least one high voltage line has left large parts of Cape Town without electricity.
City of Cape Town spokesperson Priya Reddy said a "big supply fault" on Monday evening led to the sudden blackout.
The City's Twitter account called it "a technical fault on the grid".
Cape Town's mayor, Geordin Hill-Lewis, said at least one high voltage line was down across the N1.
He said fire and electricity teams were on site "working to put out fires and get to repairing the cable and restoring power".
Some residents said they had seen veld fires near a substation close to Canal Walk.
It is not yet clear what caused the high voltage line to be damaged.
The outage stretched from the Atlantic Seaboard to parts of Woodstock and surrounds.
"The City is attending to the outage. No estimated time for restoration is available," Reddy said.
Dozens of queries re power outage in large section of CBD, Woodstock, Seaboard etc. At least one (possibly more) high voltage line is down across the N1. @CityofCT fire and electricity teams are on site working to put out fires and get to repairing the cable and restoring power. pic.twitter.com/61rtsHIQuI
— Geordin Hill-Lewis (@geordinhl) December 20, 2021
Just passed 3 separate veld fires burning under high voltage power lines running along the N1 near a substation opposite to canal walk.
— scudza (@Jarred_Za) December 20, 2021
Electricity notice:
— City of Cape Town (@CityofCT) December 20, 2021
Due to a technical fault on the grid, Area 7 has lost its power supply.
City teams are hard at work fixing the unplanned fault.
Unfortunately, it is not clear at this stage when power will be restored.#CTNews pic.twitter.com/cLuweWu0FR
Seems There’s An Unscheduled Power Cut
— Karen Anne Bloem (@kabloemski) December 20, 2021
In My Hood Of Cape Town
It Doesn’t Happen Often
And EskomSePush Has No Notice
Anybody Else’s Power Cut?
Cape Town is without power. We want to speak to the Manager!
— Goodman Sibeko ???? (@ProfGSibeko) December 20, 2021