Sandstorm warning level is disaster warning signal.

The warning signal of sandstorm is divided into three levels, which are represented by yellow, orange and red respectively.

(A) the yellow warning signal of sandstorm

Meaning: Sandstorm weather may occur within 12 hours (visibility is less than1000m), or it has already appeared and may continue.

Defense guide:

1. The government and relevant departments should do a good job in preventing sandstorms according to their duties;

2. Close the doors and windows, reinforce the structures that are easy to be blown by the wind, such as hoardings, scaffolding and billboards, properly arrange outdoor items that are easily affected by strong winds, cover building materials, and do a good job in sealing precision instruments;

3. Pay attention to carrying dust-proof items such as masks and scarves to avoid dust damage to eyes and respiratory tract;

Patients with respiratory diseases and people who are sensitive to sandstorms should not go outdoors.

(2) orange warning signal of sandstorm

Meaning: Strong sandstorm weather may occur within 6 hours (visibility is less than 500 meters), or it has already appeared and may continue.

Defense guide:

1. The government and relevant departments should do a good job in preventing sandstorms according to their duties;

2. Stop outdoor activities and dangerous outdoor operations such as high altitude and water;

3. Airports, railways, highways and other units should take traffic safety protection measures, and drivers should pay attention to sandstorm changes and drive carefully;

4. Pedestrians should ride bicycles as little as possible. Outdoor personnel should wear masks, scarves and other dust-proof articles, and pay attention to traffic safety.

(3) Sandstorm in red warning signal

Meaning: Extreme sandstorm weather (visibility less than 50 meters) may occur within 6 hours, or it has already appeared and may continue.

Defense guide:

1. The government and relevant departments shall, in accordance with their duties, do a good job in emergency rescue against sandstorms;

2. Personnel should stay in windproof and dustproof places, and do not engage in outdoor activities;

3. Schools and kindergartens postpone going to school or leaving school until the particularly strong sandstorm ends;

The plane stopped taking off and landing, the train stopped running, and the expressway was temporarily closed.