Rainstorm disaster grade

The level of rainstorm disaster, rainstorm is one of the main meteorological disasters in China, and it is a kind of disastrous weather with serious influence. Long-term rainstorm is easy to produce water accumulation or runoff flooding low-lying areas, resulting in floods. How to distinguish the level of rainstorm disaster?

The rainstorm disaster level is 1. The rainstorm is divided into four levels: rainstorm blue warning, rainstorm yellow warning, rainstorm orange warning and rainstorm red warning.

I. blue rainstorm warning

Standard:/kloc-within 0/2 hours, the rainfall will reach more than 50 mm, or it has reached more than 50 mm and the rainfall may continue.

Defense guide:

1, the government and relevant departments should prepare for the rainstorm according to their duties;

2. Schools and kindergartens should take corresponding measures to ensure the safety of students and children;

3. Drivers should pay attention to road water and traffic jams to ensure safety;

4, check the city, farmland, fish pond drainage system, drainage preparation.

Second, the rainstorm yellow warning

Standard: The rainfall will reach more than 50 mm within 6 hours, or it has reached more than 50 mm and the rainfall may continue.

Defense guide:

1, the government and relevant departments should do a good job in rainstorm prevention according to their duties;

2. The traffic management department takes traffic control measures in heavy rainfall sections according to the road conditions, and implements traffic guidance in waterlogged sections;

3. Cut off the dangerous outdoor power supply in low-lying areas, suspend outdoor work in open-air places, and transfer people in dangerous areas and residents of dangerous houses to safe places for shelter from the rain;

4, check the city, farmland, fish pond drainage system, take the necessary drainage measures.

Third, the rainstorm orange warning

Standard: within 3 hours, the rainfall will reach more than 50 mm, or it has reached more than 50 mm and the rainfall may continue.

Defense guide:

1, the government and relevant departments should do a good job in emergency prevention of rainstorm according to their duties;

2. Cut off dangerous outdoor power supply and suspend outdoor work;

3. Units in dangerous areas should suspend classes or business, and take special measures to protect the safety of students, children and other staff who have arrived at school;

4, do a good job in urban and farmland drainage, pay attention to prevent possible disasters such as flash floods, landslides and mudslides.

Fourth, the rainstorm red warning

Standard: within 3 hours, the rainfall will reach 100 mm or above, or it has reached 100 mm and the rainfall may continue.

Defense guide:

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

2. Stop assembly, suspend classes and suspend business (except for special industries);

3, do a good job in mountain torrents, landslides, mudslides and other disasters prevention and rescue work.

Heavy rain disaster level 2 There are two main hazards of heavy rain:

1, waterlogging disaster

Because of the sudden and heavy rain, poor drainage is easy to lead to waterlogging, which makes soil pores full of water, leads to hypoxia of terrestrial plant roots, inhibits root physiological activities, and makes crops suffer and reduce production.

In cities and towns, when too much rain exceeds the drainage capacity, water will flow on the road surface, and water will form in low-lying areas, resulting in urban waterlogging, which will have a great impact on transportation, industrial production, commercial activities and citizens' daily life.

2. floods

Floods caused by heavy rain flooded crops, making it difficult for crops to metabolize normally and causing various injuries. The deeper the flooding, the longer the flooding time and the more serious the harm to agriculture, forestry and fisheries.

Rainstorm causes river flooding, and also causes geological disasters such as mountain torrents, landslides and mudslides, which not only harms crops, but also damages farm houses, industrial and agricultural facilities and roads, and even causes human and animal casualties and serious economic losses.

In the history of our country, almost all floods were caused by rainstorm, such as July flood in the Yangtze River basin 1954, August flood in Hebei 1963, August flood in Henan 1975, June flood in Jianghuai 19 1, and June flood in the Yangtze River/.

Season and distribution of rainstorm:

China is a rainy country. Except for some provinces in the northwest, it is almost always heavy rain. Winter rainstorm is limited to the coastal areas of South China, with frequent rainstorm in South China from April to June. From June to July, persistent rainstorms often occur in the middle and lower reaches of the Yangtze River, with long duration, wide range and large amount of rainstorms.

July-August is the main rainstorm season in northern provinces, and the rainstorm intensity is very strong. From August to 65438+ 10, the rain belt gradually withdrew southward. After summer and autumn, the typhoon rainstorm in the East China Sea and the South China Sea is very active, and the point rainfall of typhoon rainstorm is often very large.

What are the main hazards of the third-level rainstorm disaster?

Rainstorm is one of the main meteorological disasters in China, and its harm mainly includes flood disaster. When the rainstorm happens, it is often accompanied by lightning and strong winds, which often leads to flash floods, river flooding and waterlogging, destroying crops, buildings and materials, causing human and animal casualties, crop failure or failure, and traffic and communication obstruction. Heavy rain can directly cause disasters, and it is also easy to induce geological disasters such as collapse, landslide and debris flow. Rainstorm and flood disasters involve industrial and agricultural production, transportation, communication, building facilities, urban operation, people's daily life, ecological environment and other aspects.

What are the signs before the rainstorm?

In summer, when observing the following weather signs, we should strengthen our vigilance against the occurrence of heavy rain.

1. It's sultry in the morning, and it's hard to breathe. Generally, it is a sign that the low-pressure weather system is approaching, and heavy rainfall often appears in the afternoon.

2. In the morning, I see a pagoda-shaped ink cloud uplift in the distance, and there will be a strong thunderstorm in the afternoon.

It has been clear and cloudless for several days, especially hot. Suddenly, I saw a small cloud rising on the windward slope of the mountain, and there was usually a strong thunderstorm at midnight or early morning.

On a hot night, hearing the dull thunder not far away is generally a sign that a storm is coming.

When you see funnel-shaped clouds or dragon tail clouds on the horizon, it means that the weather is extremely unstable and thunderstorms and strong winds may come at any time.