Dazaifu, Fukuoka, recorded a record high temperature of 39.3°C on July 11 [1], as extreme heat spread across Japan.
This surge in temperature marks a critical peak in the summer season, signaling a period of dangerous heat that could strain public health infrastructure and energy grids.
Japanese meteorological authorities said that 43 locations nationwide recorded a heat-wave day on July 11 [5]. This represents the first time this year that temperatures of 38°C or higher were observed in multiple locations [4].
In Fukuoka Prefecture, the heat was particularly intense. Along with the 39.3°C peak in Dazaifu [1], Kurume also recorded a high of 38.1°C [3]. The extreme conditions extended to other regions, including Hita in Ōita, which reached 38.3°C [2].
Weather agencies said the intensifying summer heat in western Japan is driven by high pressure and clear skies. These conditions have led to unusually high temperatures across the region.
Forecasters said the heat is expected to continue after July 12 [6]. Meteorological reports further indicate that the Kanto region is expected to see an intensification of heat-wave days after July 14 [7].
“Dazaifu, Fukuoka, recorded a record high temperature of 39.3°C on July 11”
The rapid onset of 38°C+ temperatures across 43 locations suggests an intensifying summer pattern for 2026. With the heat expected to shift toward the densely populated Kanto region, Japanese authorities face an increased risk of heatstroke casualties and potential power outages due to peak cooling demands.
