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[SITUATION] · [ACTIVE]

4 clusters · 11 sources · 10 days · First seen 12 days ago · Last updated 2 days ago

Categories: INTERNATIONAL

Japan July 2026 heavy rain & thunderstorm alerts

Entities: Kazuki Sawatari · Kanazawa · Ishikawa Prefecture · Kumamoto Prefecture · Japan Meteorological Agency

Overview

Mid‑July 2026 saw a wave of Level 4 heavy‑rain warnings sweep across central and eastern Japan. Starting on 16 July, thunderstorms caused record one‑hour rainfall, river rises, road closures and a landslide that buried a house in Kumamoto, Chiba, Saitama, Tochigi, Gunma and nearby prefectures. By the end of the month the focus shifted northward as a stationary front dumped intense rain on Niigata and Tochigi, prompting Level 4 alerts for cities such as Gosen, Niigata, Aga and Utsunomiya, forecasts of up to 60 mm per hour, and JR East suspending several lines. Flood‑risk warnings persisted through 24‑26 July, with thunderstorm alerts in dozens of Kumamoto municipalities, flash‑flood and landslide danger in Niigata, and a fireworks festival in Kashiwazaki proceeding under contingency plans. On 26‑27 July the disturbance spread westward. The Japan Meteorological Agency issued thunderstorm warnings for Kumamoto, Shimane, Tottori, Ishikawa, Toyama and Tochigi, urging indoor sheltering against flash floods, landslides and strong gusts. Ishikawa recorded its first Level 3 heavy‑rain warning since the system’s inception, covering Kanazawa and Nanao and triggering mandatory evacuations. Over 200 mm of rain fell in parts of Toyama, while a lightning strike disabled Noto Railway signalling, halting service. Heat‑related illnesses were reported in Kanazawa, with two women taken for suspected heatstroke. Further impacts on 27‑28 July included expanded thunderstorm warnings for dozens of Kumamoto municipalities and intense rain‑and‑hail forecasts for the Kanto‑Koshin area, predicting up to 100 mm in 24 hours. In Niigata City a ground‑floor restaurant was completely flooded, forcing the owner to discard food supplies. The Noto Railway interruption continued after a lightning strike at Noto Nakajima Station, and a second heat‑stroke case was recorded in Nomi. Kyoto Prefecture issued an early heavy‑rain warning for its southern region, cautioning of possible flooding on 27 July.

Claims

What the coverage asserts, and how well corroborated each claim is across sources.

[● 6 SOURCES] Heavy rain and thunderstorms affected multiple regions of Japan on July 27‑28, 2026. (multiple articles)
[○ 1 SOURCE] The Kumamoto Meteorological Observatory issued thunderstorm warnings for dozens of municipalities on July 27, 2026. (article 0)
[○ 1 SOURCE] In Niigata City, a restaurant's first floor was completely flooded, its breaker tripped, and all food supplies were discarded. (article 1)
[○ 1 SOURCE] Ishikawa Prefecture issued its first-ever Level 3 heavy‑rain warning for Kanazawa and Nanao on July 26, 2026. (article 3)
[○ 1 SOURCE] A lightning strike caused a signal failure at Noto Nakajima Station, halting the Noto Railway for the day. (article 3)
[○ 1 SOURCE] The Japan Meteorological Agency forecast up to 100 mm of rain in 24 hours for the Kanto and Koshin regions on July 28‑29, with risks of flood, landslides and hail. (article 4)
[○ 1 SOURCE] Tochigi Prefecture issued a weather advisory warning of possible flood, river rise and landslides on July 28, predicting up to 100 mm of rain in 24 hours. (article 5)
[○ 1 SOURCE] Heavy rain in Ishikawa caused temporary road closures and two heat‑stroke cases in Kanazawa and Nomi. (article 3)

Timeline

2 days ago

[INTERNATIONAL] 4 sources
Kyoto Prefecture Issues Heavy Rain Warning Amid Thunderstorms
Kyoto’s weather office warned of possible warning‑level rain and thunderstorms on July 27, urging residents to stay alert and avoid flood‑prone areas.
3 days ago

[INTERNATIONAL] 6 sources
Heavy Rain and Thunderstorms Hit Japan's Central and Eastern Regions
Heavy rain and thunderstorms across Japan in late July 2026 triggered Kumamoto thunderstorm warnings, severe flooding in Niigata, a first‑ever Level 3 heavy‑rain alert in Ishikawa, rail outages, and forecasts‑‑
5 days ago

[INTERNATIONAL] 5 sources
Japan hit by widespread heavy rain and thunderstorm warnings on July 24
Japan’s weather agencies warned of heavy rain, thunderstorms and landslide risks on July 24 across Kumamoto, Tokyo, Niigata and Tochigi, urging caution and monitoring of flooding.
12 days ago

[INTERNATIONAL] 7 sources
Japan faces extensive heavy‑rain warnings across multiple prefectures
Japan’s meteorological agency issued Level 4 rain, landslide and flood warnings across Kumamoto, Chiba, Saitama, Tochigi and Gunma, with record rainfall, road flooding and three people missing after a landslide

Sources

allkumamoto.com · fnn-news.com · fnn.jp · ichi-24.jp · kyoto-np.co.jp · kyoto-np.jp · news.cube-soft.jp · radmarkt.de · shimotsuke.co.jp · toyama.hokkoku.co.jp · www6.kaiho.mlit.go.jp

This summary has been updated 3 times: see revision history