The storms caused widespread flooding and infrastructure damage, with some areas receiving over 110 millimeters of rain per hour.
The Central Disaster and Safety Countermeasures Headquarters reported that as of 11 a.m., four fatalities were confirmed in the central Chungcheong provinces and the southeastern city of Daegu.
In Nonsan, South Chungcheong Province, a man was found dead in a flooded elevator of a building. In Seocheon County, a landslide buried a house, killing a man in his 70s.
In Okcheon County, North Chungcheong Province, a septuagenarian died when his car plunged into a swollen stream. Daegu reported the death of a man in his 60s, swept away by floodwaters on a farm road.
A 71-year-old man was reported missing in Yeongdong, North Chungcheong Province.
The downpour damaged 391 public facilities, including roads, river embankments and bridges. Private property damage was reported in 146 cases, involving flooded homes and vehicles.
Authorities also reported 969.2 hectares of crops were submerged, and 44.9 hectares of farmland were either washed away or buried under debris.
The floods forced 3,568 people from 2,585 households to evacuate, with 1,417 individuals from 986 households relocated to temporary shelters in community centers, schools and religious facilities.
The heavy rains led to the closure of 478 sections across 19 national parks. Transportation disruptions included the suspension of five ferry routes, partial closures of railway lines and the cancellation of six flights.
Authorities have closed 16 underground roadways and 43 road sections due to flooding risks. Six campsites and 329 walking trails have also been restricted.