Two strong typhoons in July and August 2004 caused the record heavy rainfall in Taiwan. Several floods and sediment disasters occurred in middle Taiwan, and 71 deaths and missings were recorded. Total damage was less than the former damage by the typhoons in 2001, however, the cumulative rainfall marked the maximum record at 2,115mm, was bigger than typhoon Herb in 1996.

Key words：Taiwan, sediment related disaster, debris flow, landslide, typhoon, heavy rainfall