Heavy rain signaling the start of the monsoon season hit the nation Sunday night lasting through Monday, and caused extensive damage.
Hongcheon in Gangwon Province was hit by over 221.5 milliliters of rain, while Seoul saw 151 milliliters and Namyangju, Gyeonggi Province, 145.5 milliliters.
The heavy rain caused the flooding of houses and made driving difficult.
In Yongin, Gyeonggi Province, the heavy rains caused a construction site embankment near the Gyeongbu Expressway's Singal Intersection to collapse late Sunday, causing mud to pour onto the road and block traffic. There were no casualties.
Underpasses in Suwon, Gyeonggi Province, and a riverbed road in Cheongju, North Chungcheong Province, were so flooded that driving was heavily restricted.
Cheonggye Stream in Seoul was flooded as were trails at national parks on Mount Bukhan, and at Taebaek and Songni with access being restricted. Six vehicles were damaged after 200 tons of soil and stones fell at an entrance to Mount Bukhan.
In Asan and Gongju in South Chungcheong Province and Paju and Goyang in Gyeonggi Province, roadside trees were felled by the wind and the heavy downpour.
In Hongcheon, which has received more than 300 mililiters of rain since Saturday, a flood watch was issued on the basin of the Hongcheon River, early Monday.
In Seoul, 322 housing units were flooded, while Incheon had 29 and Gyeonggi Province 65, causing residents to evacuate their homes.
The local governments arranged for them to stay at saunas and local community centers.
According to the Korea Meteorological Administration, the rain will subside from Wednesday and start again on Friday.
Meanwhile, typhoon Nanmadol is set to strike Jeju on Tuesday. After passing south of Jeju it is expected to move eastward to Japan early Wednesday.