High temperature weather refers to the weather above several degrees.

In meteorology in China, when the temperature is above 35℃, it can be called "high temperature weather", and if the highest temperature exceeds 35℃ for several days, it can be called "high temperature heat wave". The standard of high temperature heat wave recommended by the World Meteorological Organization is that the daily maximum temperature is higher than 32℃ and lasts for more than 3 days.

High temperature warning

The high temperature warning signal is divided into three levels, which are represented by yellow, orange and red respectively. Among them, the standard of high temperature yellow warning signal is: the daily maximum temperature is above 35℃ for three consecutive days; The standard of high temperature orange warning signal is: the maximum temperature rises above 37℃ within 24 hours; The standard of high temperature red warning signal is that the maximum temperature rises above 40℃ within 24 hours.

High temperature weather distribution

The high temperature weather in China is mainly concentrated in May -65438+ 10. Geographically, Jiangnan, South China, Southwest China and Xinjiang are places with frequent high temperatures. According to the statistics of 195 1-20 13, high temperature weather has occurred in all cities above the provincial level, except Lhasa and Kunming, and Chongqing has the most frequent occurrence, reaching 2050 days. Xining is the least, only 6 days.

Hazards of high temperature weather

The main impact of high temperature weather on human health is to make people feel uncomfortable, reduce work efficiency, increase the incidence of heatstroke, intestinal diseases and cardiovascular and cerebrovascular diseases, and even lead to death in severe cases. At the same time, high temperature weather will also have a greater impact on agricultural production. In agriculture, high temperature intensifies soil water evaporation and crop transpiration. When high temperature and little rain occur at the same time, it will cause serious loss of soil moisture, accelerate the development of drought and have a great impact on agricultural production. At the same time, continuous high temperature and lack of rain can easily lead to fires, which will not only destroy the ecological environment, but also endanger the lives and property of the country and people.