Tokyo issues Level 4 flood warning for Kanda River amid Typhoon 6

The Japan Meteorological Agency (JMA) and the Tokyo Metropolitan Government issued a Level 4 flood danger warning for the Kanda River at 8:25 am on June 3, 2026. The alert, which signifies that a disaster is imminent and evacuation is necessary, comes as Typhoon 6 and associated linear rainbands continue to batter the Kanto region. Authorities have confirmed evacuation information from local municipalities and warned that the river is at risk of overflowing.

This latest warning follows a rapid escalation of flood alerts across Tokyo earlier in the morning. At 7:40 am, the same agencies issued Level 4 flood danger warnings for the Nogawa and Senkawa rivers. By 8:37 am, a Level 4 warning was also declared for the Meguro River, indicating a widespread failure of drainage systems under the pressure of heavy rainfall.

The severity of the weather event has triggered coordinated emergency responses across multiple jurisdictions. Evacuation orders have been confirmed for parts of Yokohama’s Totsuka Ward and Yokosuka City in Kanagawa Prefecture. In Chiba Prefecture, authorities issued Level 4 landslide danger warnings for Isumi City and Otagi Town at 8:45 am and 8:32 am respectively, highlighting the compound risks of flooding and ground instability.

Meteorological agencies have also issued a 'linear rainband imminent prediction' for eastern Kanagawa Prefecture at 8:29 am, with earlier predictions covering southern Tokushima, Wakayama, and Mie prefectures. The JMA noted that the specific weather pattern poses a significant threat to infrastructure, with potential disruptions to transport networks including the Tokaido Shinkansen.

As the situation develops, the focus remains on the immediate safety of residents in low-lying areas. The issuance of Level 4 warnings across the Kanda, Nogawa, Senkawa, and Meguro rivers underscores the urgency of the current disaster response protocols in the capital.