Record‑Setting Floods in Chiba, Japan: Four Lives Lost

At least four people died and five others were injured in eastern Japan as unprecedented rains hit Chiba Prefecture, a region bordering Tokyo.

The deluge caused power outages in more than 20,000 households, while thousands of travellers were stranded overnight at Tokyo’s Narita airport. Authorities issued a level five emergency warning – the highest alert – Thursday night; the alert was lowered to level four Friday morning, yet they cautioned that landslide and flooding risks remain acute.

Meteorological analysis indicates warm, humid air colliding with cold upper‑level air created extremely unstable conditions, producing the most intense rainfall on record in Japan. Chiba Governor Toshihito Kumagai noted that the rains were “unprecedented even by Japan’s historical weather standards.”

The heaviest rainfall was recorded at over 100mm per hour since Thursday afternoon – roughly three times the average August rainfall and the highest volume ever documented in the country.

A woman drowned in her car when it was submerged in flooded streets, while two others collapsed on the roadside and later died. Emergency crews are prioritising rescue operations and continuing to evacuate more than 100,000 households.

Rail services were suspended and several major highways were shut as authorities closed roads to prevent further casualties. Flight operations at Narita airport resumed normal schedules on Friday, though Japan Airlines expected some delays.

Cars were left abandoned in the streets of Oamishirasato, in Chiba.