The Japanese city of Nagoya was inundated on 9 September 2026 after recording an unprecedented 105 millimetres of rain in a single hour, the highest ever measured there. The deluge triggered flood warnings across the city (a major industrial and transport hub in central Japan's Aichi Prefecture) and caused widespread disruption to residents and commuters. Authorities urged caution as infrastructure and daily routines were severely affected by the historic downpour.