A record amount of rain hit the central city of Cheongju, capital of Chungcheongbuk-do province on Sunday.
The downpour claimed 2 lives and left over 5-hundred victims, who suffered from injuries or had property damaged by the floods.
The two deaths were caused by landslides that hit the victim's house.
Over 2-hundred-90 millimeters of rain poured continuously from early in the morning to around 3 p.m., triggering a rapid rise in the levels of local streams, as well as landslides near downtown Cheongju.
The Korea Meteorological Administration issued a heavy rain advisory as the rain reached over 90 millimeters per hour.
The last time the city received such a heavy deluge of rain was 22 years ago in August 1995.
All trains and buses stopped running and residential buildings, markets, factories, and schools were all flooded.
An underground parking lot and an outdoor car rental store near Seoknam Stream among the worst hit by the floods, leaving all the car service centers nearby crowded with damaged cars.
Residents of apartments near the flooded areas escaped after hearing the buildings' evacuation alarms. When they returned the next day their homes had their electricity and water cut off.
"The water deluged the parking lot over there and I could only see the car rooftops. A little later that water began flooding our apartment."
Fortunately, the torrential rain has stopped for now and the restoration operation is under way, but the residents and local business owners are dismayed at the sight of their damaged properties.
"The water poured in like a tsunami. It reached my shoulder height. I couldn't get into my restaurant, so I waited for an hour and once I went in, all the household items and furniture had fallen over. It was a chaos."
"This area had not seen such torrential downpours in well over 20 years. Although the water levels have since gone down, there is still a lot of clearning up to be done.
Cha Sang-mi, Arirang News."