Key Facts
• August 22, 2025: Dangerous heatwave continues in western and eastern Japan.
• Tokai region records temperatures exceeding body heat, with Toyota City at 38.3°C.
• 127 locations experience temperatures above 35°C, marking 8 consecutive days of extreme heat.
• Tokyo records 35.2°C, its 5th consecutive day of extreme heat.
• Total heatwave days in 2025 reach 8,031, second only to 2024’s 10,273.
• Forecast for August 23: Tokyo, Nagoya, and Sendai expected to exceed 35°C.
• Sendai’s temperature predicted to rise by 5°C compared to August 22.
• Kyushu, Shikoku, and Chugoku regions to experience high humidity despite lower temperatures.
• Sapporo forecasted to reach 31°C as weather improves in Hokkaido.
Summary
Japan continues to face a severe heatwave, with the Tokai region experiencing temperatures exceeding body heat for 8 consecutive days. On August 22, Toyota City recorded the highest temperature nationwide at 38.3°C, while Tokyo marked its 5th consecutive day of extreme heat at 35.2°C. A total of 127 locations reported temperatures above 35°C, bringing the cumulative heatwave days in 2025 to 8,031, the second-highest since 2010. Forecasts for August 23 predict even higher temperatures in Tokyo, Nagoya, and Sendai, with Sendai expected to rise by 5°C compared to the previous day. While Kyushu, Shikoku, and Chugoku regions may see slightly lower temperatures, high humidity will persist, increasing the risk of heat-related illnesses. Hokkaido is also expected to warm up, with Sapporo reaching 31°C. Residents are advised to take precautions against heatstroke as the extreme weather continues.
