Overview
- As of the morning of September 25, no prefectures in Kyushu had issued a heatstroke alert, according to the Environment Ministry and the JMA.
- Official forecasts for September 25 placed the daily maximum WBGT at 31 or higher—classified as danger—in Saga, Nagasaki, and Kagoshima.
- Fukuoka City was forecast at WBGT 30 from noon to 3 p.m. on September 25, a severe caution level that calls for reduced outdoor activity.
- On September 24, forecasts had indicated danger-level WBGT in five Kyushu prefectures, showing continued localized risk even without formal alerts.
- Public guidance urges people to avoid outdoor exercise during peak heat, stay in cool indoor spaces, and hydrate, while separate JMA forecasts point to a return of 30°C-plus daytime highs across wide areas on September 26.