Extreme heat swept across Japan this week, with temperatures exceeding 35 °C in numerous locations [1], [2].
The heatwave poses significant public health risks to residents and visitors as temperatures climb well above normal summer levels. This extreme weather disrupts daily activities and increases the risk of heat-related illnesses in crowded urban and tourist areas.
According to reports, a strong high-pressure ridge over the region is driving the intense heat [3]. The impact was felt nationwide, with particularly high temperatures recorded in the Hokuriku region and along the seaside of western Japan [1].
Data on the scale of the event vary between sources. One report said that 118 locations recorded temperatures of 35 °C or higher [1], while another report listed 253 locations reaching that threshold [2].
Peak temperatures varied by region. In Dazaifu, Fukuoka, temperatures reached 38 °C [1]. Other high readings included 37.9 °C in Fuchū, Hiroshima, and 37.7 °C in Maizuru, Kyoto [1]. A separate report said a higher peak of 39.9 °C occurred in Date, Fukushima [2].
In Kanazawa, the heat affected the tourism sector. In the Higashi‑Chaya district, temperatures reached 34.8 °C [1]. Visitors were seen walking through the historic district using handheld fans to cope with the conditions [1].
Local authorities continue to monitor the situation as the high-pressure system persists across the archipelago [3].
“Temperatures above 35 °C were recorded at many locations”
The discrepancy in recorded temperatures and the number of affected locations suggests a widespread and volatile weather event. The presence of a strong high-pressure ridge indicates a stagnant weather pattern that can trap heat, increasing the likelihood of prolonged heat exhaustion and heatstroke for the population, particularly in high-traffic tourist zones like Kanazawa.
