The heaviest rainfall in 136 years, a "rain bomb," struck Nagoya, causing flash floods in several areas ahead of the Asian Games 2026 scheduled from 19 September to 4 October.
On 9 Sep 2026, the most severe "rain bomb" in 136 years hit Nagoya, Japan's fourth-largest city, causing flash floods in multiple areas. This occurred ahead of the Asian Games 2026, also known as "Aichi-Nagoya 2026," set to be held in Aichi Prefecture and Nagoya City from 19 September to 4 October 2026.
Nagoya experienced heavy rainfall on the afternoon of 8 September 2026, resulting in flash floods across many areas. This rainfall was the highest recorded in 136 years, with measurements reaching 104.5 millimeters within just one hour at 5:00 p.m.
Authorities issued a level 5 flood warning, the highest level, due to the rapid overflow of water flooding the streets. This has led some to question whether the incident will impact the 20th Asian Games (Aichi-Nagoya Asian Games 2026), scheduled to start on 19 September. However, others believe the authorities will manage the situation without issue.