Seoul is bracing for its first ever “severe heatwave warning” on Tuesday, as South Korea reels from a deadly heatwave that has seen the country record its highest ever temperature. South Korea has recorded 16 fatalities linked to heat and more than 2,000 people treated for heat-related illnesses since May, according to the Korea Disease Control and Prevention Agency. 0:32 South Korean president calls for action amid deadly heatwave – videoOutdoor workers are bearing the brunt of the oppressive heat. The Korea Meteorological Administration (KMA) has attributed the heatwave to overlapping high-pressure systems over the Korean peninsula combined with strong, direct sunlight under clear skies. As of Monday, Dolphin was continuing westwards towards the Japanese island of Okinawa, south of the Korean peninsula.