A survey was conducted to evaluate Tokyo residents' willingness to pay (WTP) to avoid mild heat disorders during a specified period. As a result, both of the WTPs to avoid feeling of listlessness/fatigue and febrile sensation increased with the temperature when the daily maximum air temperature is over 26.9 °C, and the WTP to avoid restless sleep showed an increase with the temperature when the daily maximum air temperature is above 29.4 °C. Fatigue caused by the air temperature rise was estimated to have been the second largest impact in our society after sleep disturbance.
