Japan is facing a dangerous heatwave with temperatures exceeding 38°C in several locations on Thursday [1].
The extreme weather has triggered widespread health warnings, as high humidity and intense solar radiation increase the risk of life-threatening heat stroke across the archipelago.
The Japan Meteorological Agency issued a heat-stroke alert for 26 prefectures [1]. The agency said, "熱中症警戒アラートを発表しました" (A heat-stroke alert has been issued) [2].
Local temperature readings reached critical levels by 1 p.m. local time. The highest temperature was recorded in Kuwana, Mie Prefecture, at 38.3°C [1]. Toyota, Aichi Prefecture, recorded 37.8°C, while Kōfu, Yamanashi Prefecture, reached 37.6°C [1].
The heatwave extended beyond the central regions. For the first time this year, temperatures reached or exceeded 35°C in both Hokkaido and central Tokyo [2].
Meteorologists attribute the spike to a strong high-pressure system over the Pacific. This system created clear skies and high humidity, factors that drove temperatures well above normal levels [1, 2].
Government officials are urging the public to take immediate precautions. A spokesperson for the Shizuoka Prefectural Government said, "命を守る行動を" (Take actions to protect your life) [2].
“Japan is facing a dangerous heatwave with temperatures exceeding 38°C”
The simultaneous spike in temperatures across diverse climates—from the northern island of Hokkaido to the urban center of Tokyo—indicates a severe atmospheric event. By triggering alerts in 26 prefectures, the government is signaling a public health crisis where the combined effect of humidity and heat exceeds the body's natural cooling capacity.
