Officials check the real-time state of electricity supply and demand at Korea Electric Power Corp.'s office in Suwon, Gyeonggi Province, on July 8, as power usage surges amid a heat wave nationwide. Yonhap

The state-run Korea Electric Power Corp. on Friday reported a second-quarter net loss of 4.83 trillion won (US$3.7 billion), remaining in the red compared with a year ago.

The company said in a regulatory filing that it continued to post an operating loss of 6.51 trillion won for the April-June period, compared with a loss of 752.9 billion won a year earlier. Revenue rose 14.2 percent to 15.52 trillion won.

The operating loss was 20.1 percent higher than the average estimate, according to a survey by Yonhap Infomax, the financial data firm of Yonhap News Agency. (Yonhap)