Japan is experiencing one of the most intense heat waves of 2026, with temperatures crossing 35°C across large parts of the country and forecasts indicating that some areas could reach 40°C. The Japan Meteorological Agency has issued heat alerts across multiple prefectures, urging residents to avoid unnecessary outdoor activities.
According to Japanese authorities, at least 14 people have died due to heat-related illnesses, while more than 10,000 people were hospitalized in just one week, making it one of the highest weekly heatstroke figures recorded in recent years. Emergency medical services in Tokyo and surrounding regions have come under heavy pressure because of the surge in emergency calls.
Hospitals have reported a sharp increase in patients suffering from dehydration, heat exhaustion and heatstroke. Elderly residents remain the most vulnerable group, although children and outdoor workers have also been significantly affected. Authorities have opened cooling centres and advised citizens to drink water regularly, stay indoors during peak afternoon temperatures and use air conditioning whenever possible.
The extreme heat has also affected daily life across Japan. Retailers have reported increased demand for portable fans, cooling garments, ice packs and electrolyte drinks. Schools and local governments have adjusted outdoor activities, while some municipalities have issued emergency public health advisories.
Meteorologists say the ongoing heatwave is being intensified by a persistent high-pressure system over eastern Japan. Climate experts warn that rising global temperatures are increasing the frequency and intensity of such extreme weather events across Asia.
The Japanese government has urged people to remain vigilant over the coming days as temperatures are expected to stay exceptionally high. Emergency services remain on alert, with officials warning that the risk of heat-related illness will continue unless weather conditions improve.