What does black stand for in the weather forecast?

There are no black ones, only four colors: blue, yellow, orange and red. Disastrous weather warning signals are divided into eleven categories, such as typhoon, rainstorm, high temperature, cold wave, fog, thunderstorm and gale, gale, sandstorm, hail, blizzard and road icing. Early warning signals are generally divided into four levels. According to the severity and urgency of disasters, the colors are divided into blue, yellow, orange and red. At the same time, it is marked in Chinese and English, representing general, heavy, serious and particularly serious respectively, and is equipped with a general disaster prevention guide.