What kind of health risks will frequent high-temperature heat waves bring to urban residents?

In recent years, extreme high temperature (heat wave) weather caused by climate warming has occurred frequently, and its serious health threat has attracted worldwide attention. At the same time, it poses a severe challenge to reduce health risks and protect people's health.

Understanding residents' perception and understanding of the health risks of climate change is very important for evaluating their willingness to take adaptive actions and formulating coping strategies for extreme weather such as heat waves. material

Materials and Methods: The basic demographic information, lifestyle, socio-economic and physical condition of 5868 residents in Harbin were collected through questionnaires. The investigation time is from 20 1 September 1 to 201February1,and the investigation area includes the suburbs of Harbin. At the same time, the individual's health risk perception level of climate change and its extreme weather events in the past, present and future is obtained through the scale.

Using the ordered logistic regression model, this paper discusses the differences of influencing factors of perception level in different time scales, especially the influence of objective temperature exposure on individual subjective cognition. Results and discussion: residents' perception of climate change in recent five years is easily influenced by long-term temperature change, and the biggest effect appears in the lag of 0 1 (or = 1.49, 95% CI: 1.34 ~ 1.65), that is,/kloc-0. In addition, the long-term and short-term effects of temperature have a certain impact on residents' perception of climate change in the next five years, and the long-term effect is more significant. Similarly, individuals' awareness of the severity of extreme weather and heat waves is also affected by long-term and short-term exposure. The higher the temperature, the more sensitive the individual's perception. Among them, the long-term temperature effect is more significant and stable.