Map showing highest daily regional temperature of Korean peninsula / Courtesy of Korea Meteorological Administration Korea's summer heat has killed 16 people so far this year, the interior ministry said Tuesday, as the nation swelters in a wave of searing weather.Between May 15 and and Aug. 2 a total of 2,025 people have suffered heat-related illnesses, of which 16 people have died, a ministry statement said.Korea's heat record has been broken three times over the past week, with the latest all-time high set at 42.5 degrees Celsius in the city of Yangsan on Sunday.The whole of Seoul was under the highest-level "severe heat wave warning" alert Tuesday, with temperatures forecast to soar again close to 40 C."Extreme, life-threatening heat is forecast," the weather agency said in a statement Tuesday.