Overview

• The Japan Meteorological Agency reported June’s average land temperature at 2.34°C above the historical norm, marking the highest June reading since records began in 1898.
• Coastal waters around Japan registered 1.2°C above their usual June average, matching the record set in 2024.
• Officials warn that July’s heat will remain severe across all regions of Japan following June’s unprecedented warmth.
• Scientists say human-driven climate change is intensifying heatwaves and increasing their frequency and scope nationwide.
• An unusually early end to the rainy season in western Japan has worsened dry conditions and elevated the risk of wildfires.