Record Rainfall Triggers Disaster Warnings in Chiba, Japan

Chiba Prefecture in Japan is facing a severe weather crisis following record-breaking rainfall on August 13, 2026. The Japan Meteorological Agency reported intense downpours, with some areas experiencing approximately 120 millimeters of rain per hour by 11:30 p.m. local time. Areas affected include Chiba City, Mobara, and Oamishirasato, with Higashikatsushika and Shirako Town also receiving around 100 millimeters per hour.

In response to the extreme weather, the Japan Meteorological Agency and the Ministry of Land, Infrastructure, Transport and Tourism issued special heavy rain warnings for 20 municipalities across Chiba Prefecture. These warnings signify a critical level of danger, urging residents to take immediate action to protect their lives. The situation has led to widespread road flooding, with reports of a woman being rescued from a car in Kashiwa but suffering cardiac arrest.

Public transportation has been significantly disrupted, with numerous JR and private railway lines in the Tokyo metropolitan area experiencing suspensions and delays. Authorities have opened facilities for stranded commuters who cannot return home due to the weather. The NHK is providing continuous updates on the evolving situation, including the latest evacuation information, weather alerts, and river conditions, emphasizing the need for residents to be aware of the risks and to prepare for potential disasters.

The extreme rainfall highlights the dangers of localized heavy downpours, a phenomenon that can occur rapidly and with devastating consequences. The warnings underscore the importance of heeding official advice, understanding evacuation protocols, and being prepared for emergencies to ensure personal safety during such events.