Japan's heatwave strains health services and infrastructure

Record summer temperatures across Japan have pushed daily highs to 38‑40 °C in regions such as Kumamoto, where the combination of recent earthquake damage and power outages has heightened the risk of heat‑related illnesses. The extreme heat has prompted local authorities to warn of potential heat‑stroke deaths and to monitor water and electricity supplies closely.

In the city of Nichinan, Miyazaki Prefecture, an outdoor pool fed by a mountain stream has become a popular refuge for families seeking relief from the sweltering weather. Meanwhile, a Japanese survey commissioned by food company Danone found that 91 % of respondents aim to lose weight in summer, yet 60 % mistakenly believe that higher temperatures increase metabolic rate. Researchers explained that basal metabolism actually declines in hot conditions because the body does not need to generate extra heat, and sweating is a cooling response rather than a sign of fat burning.

An informal experiment conducted under direct sunlight at 37 °C showed that continuously eating ice candy does not prevent heat stress; participants experienced headaches and stomach pain after a few servings, underscoring the importance of proper hydration and heat‑stroke prevention measures over reliance on cold treats.