Eskom says it will ramp up load shedding to stage 6 on Tuesday night until Wednesday morning.
Stage 6 nightly load shedding will then be implemented from 4pm to 5am until further notice, while stage 4 load shedding will be implemented from 5am to 4pm daily until further notice.
According to the power utility, seven units tripped on Tuesday, of which three have returned to service.
Also, the return to service of three other units has been delayed.
Unit 1 of Matla Power Station will be shut down tonight to repair a boiler tube leak.
Eskom said it will communicate a further update as soon as there are any significant changes.
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