Cape Town - Eskom announced on Wednesday that load shedding would move from stage 1 to stage 2 from 18:00 until 22:00 in the evening.
Have you downloaded the News24 load shedding app? Download GridWatch now.
"This is due to increased electricity demand and a shortage of generation capacity resulting from low diesel levels at our open cycle gas turbines," Eskom said in a statement.
"Eskom would like to assure customers that load shedding is implemented as a necessary measure to protect the power system and to ensure that maintenance is carried out in order to guarantee that our supply of electricity can be maintained in the long term.
"Any unexpected changes on the vulnerable and constrained power system could lead to a change in the load shedding stage at short notice.
"As we are currently experiencing cold weather conditions across the country, we urge electricity users to consider energy efficient ways of keeping warm," Eskom said.