Eskom started rolling black-outs last week and says the situation could worsen before things get better.
Eskom implemented Stage 2 load shedding on Monday, and said this was due to a further shortage of generation as a result of units that have not returned to service as expected.
“With a number of power-generating units still out of service due to breakdowns, the prognosis for today is that Eskom will be forced to implement Stage 2 load shedding from 9am to 10pm again,” Eskom spokesman, Khulu Phasiwe, said via his Twitter account.
The power utility warned about more load shedding to ease pressure on the national grid.
“Cahora Bassa hydropower plant is still supplying 700MW less to the grid as a result of a damaged transmission line which occurred late on Wednesday,” Phasiwe said.
The City of Cape Town advised residents to switch off energy-hungry appliances to reduce the impact of load shedding in City supply areas.