More than a few degrees is called hot weather.

The weather with the highest daily temperature exceeding 35℃ is called high temperature weather. 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 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.