How are sporting events in Japan adapting to extreme heat?

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Sporting events in Japan are adapting to extreme heat through rescheduling and cancellations based on heat index warnings.

Japan is currently experiencing an intense heatwave, with temperatures frequently reaching the high 30s Celsius. This extreme weather has led to the issuance of heatstroke alerts across 19 prefectures, including major urban centres like Tokyo and Kanagawa. The Japan Meteorological Agency has linked this phenomenon to climate change and a robust Pacific high-pressure system, describing it as a rare "once in a decade" event. The situation has been compounded by the premature end of the rainy season, nearly 20 days ahead of schedule in some areas, contributing to June being the hottest on record for Japan with average temperatures 2.34C above the historical norm.
Heat Index Thresholds Trigger Event Adjustments

The Japan Sport Association has established a guideline recommending the cancellation of outdoor sporting events when the heat index surpasses 31. This metric, which accounts for temperature, humidity, and solar radiation, is being closely monitored. For instance, in Tokyo, the heat index reached 32.2C by 11 am on a recent day, indicating conditions that warrant caution according to these established thresholds.
National Athletics Championships Rescheduled Due to Heat

In response to the prevailing heat conditions, the Japan Association of Athletics Federations made adjustments to its national championships. Events held at the Japan National Stadium in Shinjuku were rescheduled. These modifications were not isolated incidents, as similar delays and alterations to the event schedule had already occurred on the preceding Friday and Saturday due to the persistent high temperatures.
Early End to Rainy Season Exacerbates Heat Impact on Outdoor Activities

The early conclusion of the rainy season in several regions, including Chugoku, Shikoku, Kinki, and northern Kyushu, has significantly contributed to the severity of the heatwave. This season ended almost 20 days earlier than usual in these areas, a record-breaking early finish. This premature end meant that the typical cooling influence of the rainy season was absent, allowing temperatures to rise more rapidly and intensely, thereby increasing the risk for outdoor sporting activities.

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How are sporting events in Japan adapting to extreme heat?

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