Update (2014-03-04): Load shedding has started so check the schedule and plan for the interruptions:
If you haven’t heard already, load shedding is probably on its way. Eskom has declared a power emergency:
You can check the load shedding schedule on Eskom’s load shedding page. It’s worthwhile making sure you have emergency lights and plan for the possible load shedding timeframes. Keep your devices charged and scout out take out spots and stores that will be open and have power if your power goes out.