What does the high temperature blue warning mean?

High temperature blue warning means all meteorological warning signals in some areas. Within a certain period of time, when the maximum temperature reaches a certain height, it is a high temperature warning. High temperature warning signals are divided into four levels, represented by yellow, orange, red and blue respectively.

In Chinese meteorology, when the temperature is above 35℃, it can be called "high temperature weather". If the maximum temperature exceeds 35°C for several consecutive days, it can be called a "high temperature heat wave". It usually refers to a sustained high temperature process. Due to the long duration of high temperature, people, animals and plants cannot adapt and have adverse effects. a meteorological disaster.