Japan faces disaster-level heatwave, surge in heatstroke deaths

In the summer of 2026 Japan experienced unprecedented extreme heat, with daily maximum temperatures regularly exceeding 35 °C and some regions approaching 40 °C. The heatwave, described as "disaster‑level" by officials, triggered a sharp rise in heat‑related emergency transports and deaths, especially among the rapidly growing elderly population. The surge strained ambulance services and hospitals, highlighting the limits of Japan’s current health‑care and disaster‑response systems.

Amnesty International warned that the extreme heat is part of a broader human‑rights crisis. It linked the surge in heat‑related illnesses and deaths to corporate greed and government inaction on climate change, noting that the right to health, water, shelter and a safe environment is under threat worldwide. The organization cited WHO data showing a global increase in heat exposure, with recent heatwaves in the United States, Tunisia, the Middle East, Turkey, Bangladesh and severe drought in England, as well as widespread wildfires across Europe, North Africa and Canada. It called for urgent adaptation measures, early‑warning systems and a phased, well‑funded exit from fossil‑fuel reliance.