Research on urban safety early warning systems and emergency response mechanisms in snowstorms

Figures (6) Tables (1)

Figure 1.
Emergency management workflow.
Figure 2.
Urban security early warning system.
Figure 3.
The composition of safety early warning research.
Figure 4.
Urban safety accident grade in snowstorms.
Figure 5.
Emergency disposal procedures of urban safety accidents in snowstorms.
Figure 6.
The urban safety emergency response mechanism under snowstorms.

No.	Level	Color	Status
1	I warning		The snowfall reached more than 15 mm in 6 h or reached more than 15 mm and the snowfall continues.
2	II warning		The snowfall reached more than 10 mm in 6 h or reached more than 10 mm and the snowfall continues.
3	III warning		The snowfall reached more than 6 mm in 12 h or reached more than 6 mm and the snowfall continues.
4	IV warning		The snowfall reached more than 4 mm in 12 h or reached more than 4 mm and the snowfall continues.

Table 1.

Snowstorm weather warning signal and grade.