Heatstroke alert issued for 19 prefectures as Japan enters 'once-in-a-decade' heat wave
With climate change driving up temperatures across the globe, Japan will experience a heat wave between Sunday and July 14 on a 'level only seen once in a decade,' the Meteorological Agency said last week.
The highest temperatures are expected to reach the mid to high 30s in wide areas of the country, including 37 degrees Celsius in Nagoya, 36 C in Fukuoka, Osaka and Kochi and 35 C in Hiroshima and Tokyo, according to Weathernews.
The Japan Association of Athletics Federations, which is holding its three-day national championship in Kunitachi, western Tokyo, shifted schedules for events on Sunday after doing the same on Friday and Saturday. It has delayed some events scheduled during the day to the evening hours.
The Japan Sport Association advises all sports events to be canceled when the heat index — which takes temperatures, humidity and solar radiation into consideration — reaches 31. Tokyo is forecast to see its heat index rise to 32 at 3 p.m. on Sunday.
The summer heat has arrived ahead of schedule this year due to an early end of the rainy season in many parts of the country, particularly in western Japan. In the Chugoku, Shikoku and Kinki regions, as well as northern Kyushu, the rainy season was declared over in late June, which was nearly 20 days earlier than usual and the earliest on record, according to agency data.
Global warming has pushed up atmospheric air temperatures across the globe, the agency says, noting that the Pacific high-pressure system extending more strongly toward Japan and prevailing westerly winds meandering further north have contributed to the early end of the rainy season, which normally lasts through mid-July.
Japan experienced its hottest June ever, with the average monthly temperature being 2.34 C higher than the standard value, according to the agency.
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