Heatstroke risk rises due to high humidity and ‘wet season’ weather patterns

A survey by Neo Marketing revealed that 72.8% of respondents who experienced physical discomfort last summer believed it was due to heatstroke. Notably, even among those who reported drinking water frequently, over 72% still experienced symptoms, suggesting that simple hydration may be insufficient.

Dr. Hideki Taniguchi has identified a new risk termed ‘wet season heatstroke’ (uiki-ka netchusho). This phenomenon occurs due to climate patterns where extreme heat is interspersed with heavy rainfall. Because humidity accounts for approximately 70% of the Heat Index (WBGT), high humidity on cloudy or rainy days can push heatstroke risk to ‘alert’ levels even when temperatures are relatively moderate.

Effective prevention requires focusing on ‘core body temperature’ and ‘water retention.’ Heatstroke occurs when internal temperatures rise, even if skin temperature feels cool. Maintaining albumin levels through protein intake—such as consuming yogurt—is recommended to help the body retain water in the bloodstream and maintain temperature regulation.