Women use papers to avoid sunshine at the Gyeongbok Palace, the main royal palace during the Joseon Dynasty, in Seoul, South Korea, Aug. 1, 2018. South Korean Meteorological Administration issued a heat wave warning for Seoul and other cities. Seoul logged its highest-ever temperature of 38.8 C on Wednesday since 1907. (Photo/Agencies)
Middle school students use portable fans amid the sweltering heat during a rally demanding full compensation and apology for wartime sex slaves from Japanese government in front of the Japanese embassy in Seoul, South Korea, Aug. 1, 2018. South Korean Meteorological Administration issued a heat wave warning for Seoul and other cities. (Photo/Agencies)
A middle school student holds a portable fan amid the sweltering heat during a rally demanding full compensation and apology for wartime sex slaves from Japanese government in front of the Japanese embassy in Seoul, South Korea, Aug. 1, 2018. South Korean Meteorological Administration issued a heat wave warning for Seoul and other cities. (Photo/Agencies)
A middle school student attaches a cooling sheet on her forehead amid the sweltering heat during a rally demanding full compensation and apology for wartime sex slaves from Japanese government in front of the Japanese embassy in Seoul, South Korea, Aug. 1, 2018. South Korean Meteorological Administration issued a heat wave warning for Seoul and other cities. (Photo/Agencies)