Event

Level 4 Flood Hazard Alert Issued for Zenpukuji River in Tokyo

The Japan Meteorological Agency and the Tokyo Metropolitan Government issued a Level 4 flood danger warning for the Meguro River at 7:40 am on June 3, 2026. Authorities confirmed evacuation information from local municipalities and warned that flooding is likely to occur.

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Background

Why this event matters

On June 3, 2026, the Japan Meteorological Agency (JMA) and the Tokyo Metropolitan Government issued a Level 4 flood danger warning for the Meguro River in Tokyo at 7:40 am. This alert, indicating that flooding is likely to occur, coincided with simultaneous warnings for the Nogawa and Senkawa rivers. The warnings were issued in the context of Typhoon 6 affecting Japan, which has triggered landslide and flood alerts across multiple prefectures. Local municipalities have confirmed evacuation information for residents in high-risk areas.

event-brief

Level 4 Flood Hazard Alert Issued for Zenpukuji River in Tokyo

On June 3, 2026, the Japan Meteorological Agency (JMA) and the Tokyo Metropolitan Government issued a Level 4 flood danger warning for the Meguro River in Tokyo at 7:40 am. This alert, indicating that flooding is likely to occur, coincided with simultaneous warnings for the Nogaw

Fact cards

entity brief

Level 4 Flood Hazard Alert Issued for Zenpukuji River in Tokyo: key people and institutions

Key entities: Tokyo, Meguro River, Japan Meteorological Agency, Tokyo Metropolitan Government, Nogawa River, Senkawa River.

faq brief

Level 4 Flood Hazard Alert Issued for Zenpukuji River in Tokyo: key questions

What does a Level 4 flood warning mean? It indicates that flooding is likely to occur and authorities are urging residents to take immediate protective action. Which rivers in Tokyo are under Level 4 warnings? The Meguro, Nogawa, and Senkawa rivers. What is the broader weather co

timeline brief

Level 4 Flood Hazard Alert Issued for Zenpukuji River in Tokyo: timeline

2026-06-03T01:13:00: JMA issues 'linear rainband imminent prediction' warning for southern Tokushima, Wakayama, and Mie prefectures. 2026-06-03T07:40:00: JMA and Tokyo Metropolitan Government issue Level 4 flood danger warnings for the Meguro, Nogawa, and Senkawa rivers in Tokyo.

Timeline

2026-06-03T01:13:00

JMA issues 'linear rainband imminent prediction' warning for southern Tokushima, Wakayama, and Mie prefectures.

2026-06-03T07:40:00

JMA and Tokyo Metropolitan Government issue Level 4 flood danger warnings for the Meguro, Nogawa, and Senkawa rivers in Tokyo.

2026-06-03T08:06:00

News updates confirm evacuation information from local municipalities and warn of imminent flooding.

FAQ

What does a Level 4 flood warning mean?

It indicates that flooding is likely to occur and authorities are urging residents to take immediate protective action.

Which rivers in Tokyo are under Level 4 warnings?

The Meguro, Nogawa, and Senkawa rivers.

What is the broader weather context for these warnings?

Typhoon 6 is currently affecting Japan, causing simultaneous landslide and flood warnings in multiple regions.

What actions should residents take?

Authorities have confirmed evacuation information from local municipalities; residents in high-risk zones should follow official evacuation protocols.

What does a Level 4 flood warning mean in Japan?

It indicates a serious threat to life and property, necessitating immediate evacuation.

Which rivers are affected by the Tokyo warning?

The Nogawa and Senkawa rivers.

Is this event related to a larger weather system?

Yes, it is occurring concurrently with Typhoon 6, which is impacting multiple regions across Japan.

Have evacuation orders been issued?

Authorities have confirmed evacuation information from local municipalities, though specific orders for all residents are not detailed in the current report.

What is the current flood risk level for the Zenpukuji River?

Level 4, indicating that flooding is likely and evacuation is necessary.

What weather system is causing the alerts?

Typhoon 6, which has generated a line-shaped precipitation band.

Are there other severe weather alerts in effect?

Yes, Level 4 landslide alerts for Yokosuka (Kanagawa) and Ito, Atami, and Shimoda (Shizuoka), and a Level 5 flood special warning for the Kozagawa River (Wakayama).

What actions are authorities taking?

Authorities have confirmed evacuation information from local municipalities and warned residents in dangerous locations.