Unprecedented rainfall in Chiba leaves four dead as infrastructure paralysis deepens
Authorities in Japan’s Chiba prefecture have downgraded the emergency warning to level four following a catastrophic weather event that claimed four lives, disrupted power for 20,000 households, and left 7,000 travellers stranded at Narita Airport.
At least four people have died and five others are wounded in eastern Japan after record rainfall pummelled the Chiba prefecture, a region situated immediately adjacent to the capital, Tokyo. The Japan Meteorological Agency reported that the deluge has produced precipitation volumes exceeding 100mm per hour, a figure approximately three times the average for August and the highest ever recorded in the country.
Chiba Governor Toshihito Kumagai described the meteorological conditions as "extremely unusual" and "unprecedented" by historical weather standards. The storm was driven by warm, humid air flowing into the east of the country, which combined with cold air above to create unstable atmospheric conditions. Governor Kumagai noted that while he had responded to many disasters in the past, he had never encountered a scenario of this magnitude, prompting authorities to prioritise life-saving measures and persist with rescue operations.
The severity of the event led local authorities to issue a level five emergency warning, the highest alert available, on Thursday. This was downgraded to a level four by Friday morning, though warnings regarding landslide and flooding risks remain in effect. More than 100,000 households were initially asked to evacuate following landslides and widespread power outages. Among the fatalities, one woman died inside a car submerged on a flooded road, while two others collapsed on the streets and later succumbed to their injuries.
Infrastructure paralysis has been significant, with the storm cutting power to more than 20,000 households and leaving 7,000 people stranded at Tokyo’s Narita Airport. Several rail services remain suspended and major highways are shut, although flights are scheduled to operate normally on Friday with potential delays. Japan Airlines stated it does not expect cancellations, while approximately 1,800 people spent the night at the Chiba Prefectural Government building.
This disaster occurs against the backdrop of what is forecast to be an unusually active typhoon season. Earlier this week, the region was impacted by back-to-back storms, including Dolphin, Chan-Hom, and Peilou. Dolphin caused significant damage in Okinawa and led to the evacuation of over a million people in China, while the Philippines has again shut schools and government offices in the north due to flood threats. The rains in Chiba are expected to continue through late Friday.
