Shortly after development , Koni tracked through the Philippines , killing two people . After moving into the South China Sea , turbulence produced by the storm resulted in an aviation incident involving a commercial airliner off the western Philippines . Three of the plane 's occupants received minor injuries . In Hainan , Koni caused heavy rainfall , peaking at 189 mm ( 7 @.@ 44 in ) at a station on Wuzhi Mountain . The rains resulted in the collapse of 1 @,@ 400 homes and an estimated CN ¥ 140 @.@ 27 million ( US $ 16 @.@ 9 million ) in direct economic losses . Effects were worst in Vietnam , where three people were killed . Widespread power outages occurred , and strong winds resulted in agricultural and infrastructural damage , particularly in Vietnam 's northern provinces .