Load-shedding will be increased to Stage 4 from 14:00 this afternoon until 22:00 tonight, after which it will revert to Stage 2, Eskom has announced. It says this is due to additional breakdowns of a unit at Medupi and two units at the Duvha power station, together with the high winter demand, as well as to ration the remaining emergency generation reserves, which have been depleted.