* This story has been updated
Johannesburg - South Africans have been warned to brace for another bout of load shedding on Thursday evening from 4pm to 11pm.
This was announced by Eskom in a brief tweet, which explained that this was due to a "shortage in capacity".
The parastatal later released a statement where it said: "Eskom would like to inform South Africans and all its customers that the electricity system is severely constrained. In the power alert issued earlier this morning Eskom informed that unplanned breakdowns were at 12 300MW, and that there was a probability of load shedding at short notice if unexpected shifts, such as additional unplanned breakdowns, were experienced.
"We have experienced a loss of additional generation. As a result, it has become necessary to implement Stage 2 rotational load shedding from 4pm until 11pm in order to protect the power system from a total collapse.