South Korea's electricity demand is expected to peak this week due to a sweltering heatwave and people returning to work from vacations.
According to the Korea Power Exchange Monday the country's power demand will rise above 90-thousand megawatts this week.
It said there was a possibility that the previous record of almost 93-thousand megawatts, set last month, could be surpassed, while the reserve electricity ratio could plunge to as low as between 5.4 and 10 percent.
In order to ensure stable power supply and in case of emergencies, the level should stay above 10 percent.
The energy ministry had previously forecast that the power demand would see a season high in the second week of August.