Japan experienced a surge in heat-stroke emergencies on Friday after temperatures exceeded 40°C in parts of Mie and Gifu prefectures [1].
The spike in hospitalizations highlights the increasing danger of prolonged extreme heat for elderly populations and the strain on urban emergency services.
National data indicates that the number of people transported by emergency services for heat stroke has risen to more than 10,000 [1]. This figure represents approximately 2.2 times the number of cases recorded during the same period last year [1]. The surge follows a period where the country faced four consecutive days of extreme heat [1].
In Osaka City, emergency dispatchers reported 77 calls for suspected heat stroke on July 24 alone [1]. The intensity of the heat wave was particularly acute in Kuwana City, Mie Prefecture, and Mino City, Gifu Prefecture, where temperatures surpassed 40°C [1].
Survivors of severe heat stroke have described the disorientation and long-term risks associated with the condition. A woman in her 70s, who was among those hospitalized, said she did not understand why she was being transported. "I don't know why. I don't know why, myself," she said [1]. She said she was "surprised" by the sudden onset of her condition [1].
Earlier this year, the trend of rising temperatures began to manifest in May. Between May 11 and May 17, 1,012 people nationwide were transported for heat stroke, which was a 1.7-fold increase compared to the previous year [2].
“"I don't know why. I don't know why, myself,"”
The rapid increase in heat-stroke cases, particularly the 2.2-fold jump compared to previous years, suggests that traditional public health warnings may be insufficient against current climate extremes. The fact that patients are being hospitalized without realizing they are in danger—as evidenced by the testimony of the elderly patient—indicates a critical need for more aggressive community monitoring and intervention strategies for vulnerable populations during multi-day heat waves.
