Tracks the September 2026 disaster in which linear rainbands brought the heaviest one-hour rainfall on record to Nagoya, flooding urban roads and railway tracks and paralyzing public transport. A Level 5 flood emergency warning was issued for the Shonai River, followed by evacuations, preliminary damage assessments, a warning downgrade and recovery operations.
5 events · 9 sources · Updated 38 days ago
Tokai TV News ONE report on Nagoya's record hourly rainfall of 104.5 mm, its causes, and local flooding conditions
東海テレビ ニュースONE
As linear rainbands formed, Nagoya recorded a maximum one-hour rainfall of 104.5 mm and a daily total of 219.5 mm. The hourly figure was the highest since observations began in 1890 and exceeded the 97 mm recorded during the 2000 Tokai flood.
The Japan Meteorological Agency issued a Level 5 flood emergency warning for the Shonai River, saying a disaster was extremely likely to have already occurred in areas including the projected inundation zone and urging immediate action to secure safety. Nagoya issued emergency-safety and evacuation orders for some areas as river levels rose.
The Nagoya City Transportation Bureau suspended all subway and city bus services amid record rainfall. Roads and railway tracks flooded across central Nagoya, and the city opened temporary facilities near major stations for stranded people.
Aichi Prefecture's preliminary tally as of the night of September 8 recorded four minor injuries, seven homes with above-floor flooding and eleven with below-floor flooding. The figures remained provisional as damage assessments continued.
The Level 5 flood emergency warning for the Shonai River was downgraded to a Level 2 advisory at 12:40 a.m. on September 9. Nagoya temporarily closed municipal kindergartens and schools because further heavy rain remained possible.