The overnight rain had already put large parts of northern Taiwan under water by daybreak on 17 September. Overdeveloped Hsichih was quickly inundated because of the reduced capacity of the Keelung River since it was straightened. Of Taipei County's 29 townships and cities, only a handful, such as Tucheng and Tanshui, came off unscathed.
經過風雨徹夜肆虐，十七日北台灣已成水鄉澤國，除了受基隆河截彎取直之害、短期內過度開發的汐止地區再成水都，台北縣廿九鄉鎮市竟然只有土城、淡水少數地區躲過一劫。