The yellow warning is a three-level warning. Early warning signals are generally divided into four levels (IV, III, II and I). According to the severity and urgency of disasters, the colors are blue, yellow, orange and red in turn. Yellow warning represents eleven kinds of disasters, such as typhoon, rainstorm, high cold wave, fog, thunderstorm and gale, gale, sandstorm, hail, blizzard and road icing.

Yellow is the representative color of the third warning level, when bad weather may cause serious harm to the environment and human body. Yellow warning generally includes typhoon yellow, rainstorm yellow, cold wave yellow, gale yellow, high temperature yellow, lightning yellow, frost yellow, fog yellow, road icing yellow, haze yellow and forest fire yellow warning signals.