Japan is facing extreme heat on Tuesday, with temperatures expected to hit 40°C in Kumamoto City and Hita [1].
These conditions are life-threatening because the heat is driven by warm air circulating around the approaching Typhoon 13. This atmospheric pattern creates a dangerous environment where high temperatures persist across a vast area of the country.
Heat-stroke alerts have been issued for 41 prefectures [1], including the Kanto region. Forecasters expect Kumamoto City and Hita in Ōita Prefecture to reach a maximum of 40°C [1]. Other cities, including Kyoto City and Kumagaya in Saitama Prefecture, are forecast to reach 39°C [2].
Early readings on Tuesday already showed significant heat. By 11 a.m., the temperature at Hagi Susa in Yamaguchi was 36.4°C [2]. During the same period, Miyazu in Kyoto recorded 36.2°C [2].
Authorities are urging the public to take extreme precautions. "Please be strictly on guard against heatstroke," the FNN News Department said [3].
The combination of high humidity and extreme heat often precedes the arrival of a typhoon's center. This specific weather phenomenon can lead to an increase in heat-related illnesses before the storm's rain and wind arrive.
“"Please be strictly on guard against heatstroke."”
The interaction between Typhoon 13 and the mainland demonstrates how tropical cyclones can exacerbate heatwaves by pumping warm, moist air into surrounding regions. This creates a dual-threat scenario for emergency services, who must manage public health crises related to extreme heat immediately before transitioning to disaster response for wind and flood damage.
