‘Extreme Heat’ is not enough… Japan will now call days over 40 degrees Celsius ‘this’

Japan is grappling with increasingly severe heatwaves, prompting its Meteorological Agency (JMA) to introduce a new, more alarming term for days exceeding 40 degrees Celsius: 'Kokushōbi' (酷暑日), or 'severe heat day'. As reported by Dong-A Ilbo, this decision stems from the alarming reality of extreme temperatures becoming a recurring phenomenon, necessitating a clearer and more impactful way to communicate the associated dangers.

The naming process itself, involving a public survey, highlights the collective concern and the desire for a term that accurately conveys the severity of the situation. The overwhelming preference for 'Kokushōbi' over other suggestions like 'Chōmēshobi' (super severe heat day) indicates a public consensus on the need for a stark warning. This reflects a cultural tendency in Japan to seek precise terminology for natural phenomena, especially when they pose a significant threat to public well-being.

Historically, Japan categorized heat under broader terms like 'Mēshobi' (hot day, over 35°C) or simply 'summer days'. However, the unprecedented heat experienced last year, which led to approximately 100,000 people being treated for heat-related illnesses, underscored the inadequacy of these classifications. The introduction of 'Kokushōbi' signifies a crucial step in refining the country's heatwave warning system, moving towards a more nuanced approach that acknowledges the escalating climate crisis.

Dong-A Ilbo frames this development not just as a meteorological update but as a public health imperative. The JMA's commitment, in collaboration with the Japan Meteorological Association, to use this new term to "reduce heatstroke victims by even one person" underscores the gravity of the situation. This proactive measure is vital for a nation like Japan, known for its densely populated urban centers and an aging population that is particularly vulnerable to extreme heat. The new designation serves as a critical tool for public awareness and preparedness in the face of a changing climate.