 Typhoon Rammasun passed a short distance west of Cheju @-@ do , an island offshore South Korea , dropping more than 300 mm ( 12 in ) of rainfall . High surf killed one person on the island , and officials restricted access to <unk> mountain and all parks . Seven boats were damaged , and many roads on the island were flooded . Before Rammasun struck the South Korean mainland , airline officials canceled 167 flights . There were three deaths on the mainland , including one boy who drowned in floodwaters . Damage in the country totaled $ 9 @.@ 5 million , much of it property damage ; there was also damage to the rice crop . Rainfall extended into neighboring North Korea , damaging rice and maize . Later , Rammasun brought the average monthly rainfall in only two days in portions of Primorsky Krai , causing flooding along roads and riverways . 
