Yangsan, South Gyeongsang Province recorded a temperature of 42.5 degrees Celsius on Sunday, the highest ever measured in Korea since modern weather observation began in 1904, as a record-breaking heat wave grips the country. The temperature was recorded at approximately 1:26 p.m. The southeastern city set a new local temperature record for a fourth straight day since Wednesday, with temperatures climbing higher each day. Daytime temperatures also topped 40 degrees in other areas, including northern Busan, Gimhae in South Gyeongsang Province, Gyeongju in North Gyeongsang Province and Gwangyang in South Jeolla Province. At 11 a.m., the Korea Meteorological Administration (KMA) upgraded the heat wave advisory for northwestern Seoul to a heat wave warning, placing all of the capital under the second highest-level heat alert. Heat wave warnings had already been in effect for southeastern, southwestern and northeastern Seoul since Wednesday. As the prolonged heat wave continued across the country, the government raised the Central Disaster and Safety Countermeasures Headquarters to Level 2, s