Taisho (Dashu, solar term) of 2025 in Japan fell on July 22. It was extremely hot as the calendar indicated all over Japan. The city of Fukuchiyama in Kyoto Prefecture recorded the highest temperature of 39.0 degrees Celsius (39.0℃). The city of Ichinoseki in Iwate Prefecture recorded 38.3℃, which was the highest temperature on record in the city.
https://en.wikipedia.org/wiki/Dashu_(solar term) ; https://www.japantimes.co.jp/news/2025/07/06/japan/heatstroke-alert-issued-in-tokyo/
In Japan, a day where the highest temperature reaches 35 degrees Celsius (or 95 degrees Fahrenheit) or higher is defined an “extremely hot day,” or “moushobi” in Japanese. It is a specific meteorological term used to categorize days with extreme heat.
Here’s a breakdown of Japanese temperature classifications for summer days:
Natsubi (summer day): A day with a maximum temperature of 25°C (77°F) or higher.
Manatsubi (hot summer day): A day with a maximum temperature of 30°C (86°F) or higher.
Moushobi (extremely hot summer day): A day with a maximum temperature of 35°C (95°F) or higher.
Nettaiya (tropical night): A night where the minimum temperature does not drop below 25°C (77°F).
https://en.wikipedia.org/wiki/Climate_of_Japan; https://en.wikipedia.org/wiki/Heat_wave
Europe has been experiencing record-breaking high temperatures in 2025, particularly during the months of June and July, with multiple heatwaves impacting various regions. These extreme temperatures are linked to a combination of meteorological conditions and the effects of climate change, with some areas experiencing temperatures 2.5°C warmer than in the past.
https://en.wikipedia.org/wiki/2025_European_heatwaves; https://climate.copernicus.eu/heatwaves-contribute-warmest-june-record-western-europe; https://www.theguardian.com/environment/2025/jun/28/europe-on-alert-as-first-major-heatwave-of-2025-pushes-temperatures-to-42c
A significant heat wave is currently impacting the central and eastern United States as well, with dangerous temperatures and high humidity affecting millions of people.
https://www.scientificamerican.com/article/heat-domes-extreme-heat-and-humidity-triggers-alerts-across-eastern-u-s/; https://edition.cnn.com/2025/07/21/weather/heat-dome-midwest-south-east-climate; https://www.theguardian.com/environment/2025/jun/28/us-heatwave-climate-crisis