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As Japan bakes, over 10,000 rushed to hospital for heatstroke in a week

Dangerously high temperatures in Japan have sent more than 10,000 people to hospitals for heatstroke in a single week, more than double the same period last year.

By Jessica Speed·Jul 23·japantimes.co.jp·2 min read

Intelligence analysis by Llama

Japan has seen a surge in heatstroke cases, with over 10,000 people rushed to hospitals in a week, more than double the same period last year. The heat has been particularly severe, with temperatures reaching 40 degrees Celsius in some areas.

Why it matters

The heatwave in Japan is not only a health concern but also a reflection of the country's vulnerability to climate change. The increasing frequency and severity of heatwaves pose a significant threat to public health and the economy.

Imagine you're playing outside on a really hot day. You might feel dizzy or sick if you don't drink enough water. That's kind of what's happening to people in Japan right now. The heat is so bad that it's making people very sick, and they're having to go to the hospital. It's like the whole country is one big, hot playground, and people are getting hurt.

Analysis

A Record-Breaking Heatwave

Japan has experienced a record-breaking heatwave, with temperatures reaching 40 degrees Celsius in some areas. This has led to a surge in heatstroke cases, with over 10,000 people rushed to hospitals in a week. The heat has been particularly severe, with temperatures exceeding 40 C in Gifu and Kyoto prefectures, marking the first such readings in recorded history.

Vulnerable Populations

Older people and young children are more vulnerable to heat-related illnesses. Authorities have urged people to remain in air-conditioned spaces, avoid unnecessary outings, and drink water before feeling thirsty. However, despite these precautions, the number of heatstroke cases continues to rise.

A Global Concern

Heat stress is rising worldwide as human-induced climate change makes heat waves more frequent and severe. Japan experienced record-breaking summer heat for a third consecutive year in 2025. Heat waves and wildfires are also sweeping across parts of Europe, with blazes affecting Spain, France, Italy, Greece, and Cyprus.

Key points

  • Over 10,000 people rushed to hospitals for heatstroke in a week, more than double the same period last year.
  • Temperatures reached 40 degrees Celsius in some areas, marking the first such readings in recorded history.
  • Older people and young children are more vulnerable to heat-related illnesses.
  • Authorities have urged people to remain in air-conditioned spaces, avoid unnecessary outings, and drink water before feeling thirsty.
The Upside

If the heatwave subsides and temperatures return to normal, the number of heatstroke cases is expected to decrease. Additionally, authorities are taking steps to mitigate the effects of the heatwave, such as providing air-conditioned spaces and urging people to stay hydrated.

The Downside

The heatwave is expected to continue for the foreseeable future, with temperatures remaining high throughout the summer. This poses a significant threat to public health, particularly for vulnerable populations such as older people and young children.

Originally reported at

japantimes.co.jp

Discernion covers the story. Read the full piece at the source.

Tagsheatwavesheatstrokehealthhospitalsclimate change

Author

Jessica Speed

Intelligence analysis by

Llama

Published

Jul 23, 2026

Source

japantimes.co.jp

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Topics

heatwavesheatstrokehealthhospitalsclimate change

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