• Japan records unprecedented five-day streak of temperatures reaching 40°C (104°F), the longest on record

    Japan recorded temperatures of 40°C (104°F) or higher for the fifth consecutive day on July 25, 2026, marking the country’s longest such streak on record as an exceptionally persistent heatwave continued under a dominant Pacific high-pressure system. Heatstroke alerts remained in effect across much of the country, while additional climatological analysis suggests this summer is already approaching last year’s record number of locations reaching the 40°C (104°F) threshold.

  • Japan endures hottest June on record

    Japan recorded its hottest June since records began in 1898, with average temperatures 2.34°C (4.21°F) above normal and over 200 locations registering highs of 35°C (95°F) or more, the Japan Meteorological Agency reported on June 30, 2025.

  • Heatwave kills four in Japan, alerts in place for the coming days

    At least four elderly women died of suspected heatstroke on June 17, 2025, in Japan’s Kanagawa, Shizuoka, Saitama, and Gunma Prefectures. More than 60 monitoring stations recorded temperatures at or above 35 °C (95°F). Temperatures are expected to rise until June 20, and a heat advisory is in place.

  • Record-breaking heatwave hits Hokkaido, Japan

    An unprecedented heatwave is sweeping over Hokkaido, Japan, with numerous all-time records falling almost every day. Very high temperatures are expected to continue over the next 14 days. One of the most notable records on July 27 was registered in Asahikawa, holder…