As usual Eskom denies massive blackout in January and February next year but just in case, that time of year its really hot and I can remember last year every hour the fans go stand still and the aircons stop. I guess the only thing on can do is get UPS or solar powered cooling systems.
Although because of the storms here in Cape Town and the rest of the country i am not so sure we can really predict what will happen next year and if there will even be a really hot summer.