Why is ‘invincible Gangnam’ prone to flooding?

A man wading alongside submerged cars in a street during heavy rainfall in the Gangnam district. — AFP

RECORD-BREAKING torrential downpours swamped many parts of Seoul and Gyeonggi Province last Monday.

But the hardest hit area in the region was Gangnam, the capital’s affluent residential district, and its surrounding neighborhoods. Images and videos of people wading through knee-high water near Gangnam Station and cars submerged underwater and left stranded in the middle of the road in nearby Daechi-dong went viral.