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Temperatures Surge to 34.4°C as Japan Battles Unusual Rainy-Season Heatwave

High humidity is driving a surge in heatstroke cases that is straining Tokyo hospitals

Overview

  • The Japan Meteorological Agency recorded June heat records in 14 cities, with Tokyo reaching 34.4°C on June 18.
  • Tokyo medical teams treated at least 57 heat-related patients on June 18 following 169 cases the previous day.
  • Fire and Disaster Management Agency data show 3,833 people were hospitalized for heatstroke from May to June 8, surpassing last year’s toll for the same period.
  • Senior citizens account for over 80% of heat-related deaths and at least three fatalities were reported elsewhere in Japan this week.
  • Medical experts warn that high humidity during the rainy season hinders sweat evaporation and masks dehydration, leading to gradual onset of heatstroke.