Key Facts
• Japan’s Meteorological Agency issued a high-temperature advisory on July 7.
• Extreme heat, occurring once every 10 years, expected from July 13.
• Regions affected: Almost all of Japan, excluding Okinawa.
• Predicted temperature anomalies (5-day average):
– Hokkaido: +2.2°C
– Tohoku: +2.5°C
– Kanto-Koshin: +2.7°C
– Hokuriku: +2.6°C
– Tokai: +2.2°C
– Kinki: +2.1°C
– Chugoku: +2.3°C
– Shikoku: +1.8°C
– Northern Kyushu: +2.0°C
– Southern Kyushu/Amami: +1.3°C
• Heatstroke risk remains high; hydration and shade are essential.
• Heatstroke alerts may be issued for extreme conditions.
• Warm air masses will dominate for the next two weeks, intensifying heat.
• Southern Kyushu and Amami may see normal temperatures before July 13.
• Advisory emphasizes health precautions during outdoor activities.
Summary
Japan’s Meteorological Agency has warned of an extreme heatwave starting July 13, with temperatures reaching levels seen only once every decade. Almost all regions, excluding Okinawa, will experience significant temperature increases, with anomalies ranging from +1.3°C to +2.7°C. The heatwave is attributed to persistent warm air masses expected to dominate for the next two weeks. Regions like Hokkaido, Tohoku, and Kanto-Koshin are forecasted to face the highest temperature deviations. The agency urges the public to take precautions against heatstroke, including staying hydrated and seeking shade during outdoor activities. Heatstroke alerts may be issued for severe conditions. Southern Kyushu and Amami may experience normal temperatures until July 13, after which the heat is expected to intensify. This advisory highlights the importance of health management during this period of unprecedented heat.
