Key Facts
• Japan Meteorological Agency issued a nationwide high-temperature alert on August 28.
• Unusual heat levels expected from September 3, occurring once every 10 years.
• Regions affected: Hokkaido, Tohoku, Kanto-Koshin, Hokuriku, Tokai, Kinki, Chugoku, Shikoku, Kyushu (North and South), Amami, Okinawa.
• Criteria for ‘significant high temperatures’: 5-day average temperature exceeding normal by 0.9°C to 2.7°C.
• Hokkaido: +2.7°C; Tohoku: +2.7°C; Kanto-Koshin: +2.3°C; Hokuriku: +2.6°C.
• Tokai: +1.8°C; Kinki: +2.1°C; Chugoku: +2.4°C; Shikoku: +1.9°C.
• Kyushu North (including Yamaguchi): +1.8°C; Kyushu South/Amami: +1.2°C; Okinawa: +0.9°C.
• Heat-related health risks, including heatstroke, are expected to rise significantly.
• Farmers and livestock managers advised to take precautions.
• Heatstroke alerts to be issued for extreme conditions within a week.
• Alert covers September 3–14, with updates every Monday and Thursday.
Summary
The Japan Meteorological Agency has issued an early weather alert for significant high temperatures across the country, starting September 3. This rare phenomenon, occurring once every decade, will affect all regions, with temperature deviations ranging from +0.9°C in Okinawa to +2.7°C in Hokkaido and Tohoku. The alert emphasizes the increased risk of heat-related illnesses, including heatstroke, and advises precautions for outdoor activities, agriculture, and livestock management. Updates will be provided regularly, and heatstroke alerts will be issued for extreme conditions. Residents are urged to stay hydrated, seek shade, and monitor official announcements.
