A summer heatwave gripped the nation this Saturday,... with the daytime high peaking at nearly 36 degrees Celsius in Seoul, the highest early-July figure in 80 years.br Heatwave warnings have been issued in Seoul, Daejeon and Sejong City,... as well as many parts of Gyeonggi-do and Gangwon-do provinces. br The weather agency says... scorching heat in the central regions could last until Wednesday,... when showers are forecast nationwide.br Due to the heat, the number of patients suffering from heat-related illnesses are on the rise,... so make sure to stay hydrated and refrain from outdoor activities during the sizzling hours.