Nine dead in Japan's record Chiba rainfall

Torrential rain that began late on Thursday, August 13, 2026, in Chiba Prefecture, Japan, has resulted in nine confirmed deaths and one person still missing, according to the prefectural government's disaster response team. The downpour, described by the Japan Meteorological Agency as an "unprecedented level of heavy rain," brought 300 millimeters (nearly 12 inches) of rain in 24 hours to a weather station in the prefecture, making it the area's wettest August in six decades. By Friday morning, the city of Chiba had recorded more than three times the rainfall typically seen in the entire month of August, according to Tokyo's land ministry.

The victims include a man in his 70s found in an irrigation canal in the city of Isumi, a woman in her 70s discovered inside a vehicle submerged up to its roof in the city of Kashiwa, and a man in his 40s trapped in a flooded car in an underpass in the city of Chiba. Additionally, a man went missing after telling another man, who was calling for help from the roof of a flooded car, that he would return with rescue equipment. The disaster has also caused significant property damage: one house was fully destroyed, 23 houses were half-destroyed, and 49 others were partially damaged. Flooding affected 597 houses above the floor and 490 houses below the floor, with the number expected to rise as surveys have not yet been completed in the severely hit cities of Ichihara and Oamishirasato. More than 1,000 households reported flooding, and an estimated 1,200 cars remain abandoned on roads, with authorities working to tow them away.

The heavy rain triggered landslide warnings and power outages, and the meteorological agency issued its highest-level heavy rain warning for the Chiba region for the first time. The downpour snarled roads and rail services, causing widespread disruption. As of Saturday, 463 people were staying at 92 evacuation shelters in the prefecture. The disaster management office listed eight dead as of Saturday evening, but the toll rose to nine by Sunday morning, according to NHK's tally. The prefectural government's disaster response team confirmed the ninth death on Saturday.

Scientists say that human-driven climate change is making extreme weather events more frequent, prolonged, and intense. This event is consistent with that trend, as the region experienced record rainfall and flooding. The full extent of the damage is still being assessed, and the number of affected houses and vehicles may increase as surveys progress. The authorities continue to work on rescue and recovery operations, including removing abandoned vehicles and providing shelter for displaced residents.