The Japan Meteorological Agency and the Ministry of the Environment announced that it will operate from October 26 to October 10. The "Heat Stroke Warning Alert" is announced when the risk of heat stroke is predicted to be extremely high, using the "heat index" based on temperature and humidity.
At 4 a.m. on August 10 last year, a heat stroke warning alert was issued for 889 areas, or more than 8% of the total, and the maximum temperature reached 2.5 degrees Celsius in Koshigaya City and Kofu City.