TOKYO — Heavy, record-breaking downpours have pummeled eastern Japan, leaving at least eight people dead, multiple injured, and causing severe infrastructure damage across Chiba Prefecture, just east of Tokyo.
What Happened
Record Precipitation: Localities logged over 100 mm (nearly 4 inches) of rainfall per hour—an amount equivalent to the region’s typical monthly total for August—flooding urban streets and overwhelming drainage systems.
Highest-Level Alerts: The Japan Meteorological Agency (JMA) temporarily issued its Level 5 Emergency Warning—the highest level on Japan’s threat scale—for parts of Chiba Prefecture for the first time.
Extreme Weather Pattern: Meteorologists explained that unusually warm, humid air collided with cold atmospheric air above eastern Japan, creating unstable convective storms during an active typhoon season.
Casualties & Human Impact
Fatalities: Victims included a man in his 60s/70s discovered on a flooded road in Ichikawa, a woman trapped in a submerged vehicle in Sakura, and several others trapped in floodwaters or collapsed vehicles across Kashiwa and Chiba City.
Stranded Travelers: Roughly 7,000 passengers spent the night stranded at Tokyo’s Narita International Airport as access roads and train connections were cut off. Another 4,000 people were stranded near Soga Station before being evacuated by military buses.
Blackouts & Evacuations: Tens of thousands of homes lost electricity, and local authorities issued evacuation orders affecting over 400,000 residents
