A tropical storm named Jangmi unleashed heavy rainfall across east-central Japan on Wednesday, June 3, 2026, elevating flood risks in the densely populated Tokyo region. The storm caused widespread disruption, paralyzing street traffic, leading to hundreds of flight cancellations, and suspending or delaying train services.
Power Outages and Evacuation Advisories
Tokyo Electric Power Company Holdings reported that more than 5,000 homes lost power in the capital region. In downtown Tokyo, authorities advised residents near the Zenpukuji River to take shelter as television footage showed swollen, muddy water on the verge of overflowing.
Storm Intensity and Warnings
The Japan Meteorological Agency (JMA) stated that Tropical Storm Jangmi was located east of Shima city midmorning, moving northeast with maximum sustained winds of 90 kilometers per hour (55 mph). The agency issued the highest-level flood warnings for several areas in central and eastern Japan, urging people living along rivers and in vulnerable zones to move to higher ground for safety.
In the Owase area of central Japan, the storm dumped 50 centimeters (20 inches) of rain in the past 24 hours. The JMA forecasted up to 20 centimeters (8 inches) of additional rain through Thursday morning in some regions, including Tokyo.
Landfall and Previous Impact
Jangmi initially made landfall in Wakayama prefecture as a typhoon with winds of 126 kph (78 mph) before moving inland and weakening significantly. It was expected to maintain tropical-storm strength for much of the day. Earlier, the typhoon struck the southern island of Okinawa, leaving 15 people with minor injuries.
