What does the color grade of rainstorm warning mean?

The color grade of rainstorm warning indicates the severity of rainstorm.

1, blue rainstorm warning signal

It means that the rainfall will reach more than 50 mm in 12 hours, or it has reached more than 50 mm and the rainfall may continue. There may be heavy rain, which will generally have a certain impact on agriculture and transportation, but it will not cause great losses.

2. Yellow rainstorm warning signal

It means that the rainfall will reach more than 50 mm within 6 hours, or it has reached more than 50 mm and the rainfall may continue. There may be heavy rainfall, which has a great impact on agriculture and transportation and may cause certain losses.

3, rainstorm orange warning signal

It means that the rainfall will reach more than 50 mm within 3 hours, or it has reached more than 50 mm and the rainfall may continue. There may be heavy rainfall, which has a great impact on agriculture and transportation and may cause great losses.

4. Red rainstorm warning signal

It means that the rainfall will reach 100 mm or above within 3 hours, or it has reached 100 mm and the rainfall may continue. There may be heavy rain, which will have a serious impact on agriculture and transportation and may cause great losses.

Possible hazards caused by rainstorm:

1, flash floods

Rainstorm and mountain torrents often cause local floods because of their concentrated water volume, high velocity and strong scouring destructive power, and sediment and even stones are entrained in the water flow.

The house was washed away.

Because heavy rain causes floods and landslides, it is easy to cause residential houses to collapse, which may cause serious economic losses or casualties.

3. The farmland was flooded.

This is mainly due to the excessive rainfall in a short period of time, which has led to the phenomenon of burst banks and piping in many river embankments, causing the river to overflow and a large number of farmland to be flooded.

4. Communication interruption

Because of large-scale and extremely heavy rainfall, some base stations are easily destroyed, resulting in poor communication or even interruption.