Eskom warns power reserve is razor thin

South Africa's power reserve margin for Monday evening is expected to be extremely tight at 63 megawatts, or just under 0.2 percent of available power, state-run utility Eskom said.

South Africa's economic hub of Gauteng province, home to the financial centre of Johannesburg and a quarter of the country's population, was hit on Sunday with the first blast of cold weather in the southern hemisphere winter.