A pedestrian walks with a parasol at Dongdaegu Station Plaza in the southeastern city of Daegu, Friday, as a heat wave advisory remains in effect for the city. Yonhap

As the summer monsoon begins to retreat from the Korean Peninsula, Korea is bracing for an extended spell of intense heat, with daytime temperatures forecast to soar to as high as 38 degrees Celsius over the weekend and heat wave alerts expected to expand across much of the country.

According to the Korea Meteorological Administration (KMA), Friday, rain will linger through the morning in parts of the greater Seoul area, Gangwon Province and Jeju Island, before largely clearing by the afternoon.

Once the rain clouds move out, oppressive heat is expected to set in quickly.

Heat wave advisories are already in effect for parts of South Jeolla Province, Gyeongsang Provinces and Jeju Island and the KMA expects the warnings to be extended to additional regions in the coming days.