- Heavy rainfall on September 4 triggered over 60 flooding reports across Keelung, with hourly precipitation exceeding 80 millimeters and surpassing the city's 50-millimeter warning threshold.
- In anticipation of high spring tides creating drainage pressures in low-lying districts, the Keelung City Government deployed large water pumps to the Aisai Night Market area.
- The Central Weather Administration stated that it issued eight heavy rain special reports and five torrential rain instant messages prior to the event, noting that warnings cannot be judged fairly by posterior rainfall volumes.
Compiled from the available source excerpts. Follow the source links for full reporting.