According to the weather bureau's news briefing, the Methods on the Early Warning of Meteorological Disasters were implemented after June 2007.

　　The Methods have further classified the warnings into 14 categories of typhoon, rainstorm, snowstorm , cold wave, gale, sand storm, high temperature, drought, thunderstorm, hail, frost, fog, haze and ice. In line with the extent of damage, the seriousness, the urgency, and the trend, these disasters were graded into four groups of average, relatively serious, serious and exceptionally serious, marked by colors of blue, yellow, orange and red, respectively, with Chinese and English translations attached.