What are the hazards of rain, and is rain harmful to people?

Floods are the most harmful part of rain, followed by acid rain.

In July 1987, Bangladesh experienced the largest flood on record. Days of torrential rain and raging winds, this sudden natural disaster overwhelmed the unprepared residents. In just two months, floods and torrential rains have hit 47 of Bangladesh's 64 districts, killing more than 2,000 people, drowning 10,000 livestock, destroying more than 2 million tons of food, destroying 20,000 kilometres of roads and 772 bridges and culverts, collapsing tens of millions of houses, damaging vast swaths of crops, and affecting 20 million people.

For example, the famous Cologne Cathedral in Germany, with its two 157-meter-high minarets, has corroded and uneven stone walls. The statues of angels and Maria leading to the population have been eroded to the point where they are difficult to recover. The sandstone (which is more perishable) stone carvings have even corroded 10 centimeters in the last 15 years.

The famous Taj Mahal in India, which has been inscribed on the World Heritage List, has lost its luster due to atmospheric pollution and acid rain corrosion, and the milky white gradually yellows, and some have turned rusty.

Acid rain is known as the "Grim Reaper in the air" abroad, and its potential harm is mainly shown in four aspects:

1. Harm to aquatic systems, loss of fish and other biological communities, alteration of nutrient and toxic cycles, dissolution of toxic metals into the water and entry into the food chain, reduction of species and loss of productivity. It was reported that 180,000 lakes in Sweden, the "Land of a Thousand Lakes", were acidified from the early 70s to the mid-80s due to acid rain. In China, it was reported that the water body in Nanshan and other places in Chongqing was acidified, and the pH value was less than 4 7, and the fish could not survive.

2. Harm to terrestrial ecosystems, mainly in soil and plants. Effects on the soil include inhibition of the decomposition of organic matter and nitrogen fixation, leaching of nutrients such as calcium, magnesium, potassium, etc., and impoverishing the soil. For plants, acid rain damages the new leaf buds, affecting their growth and development, leading to the degradation of forest ecosystems.

It is reported that 65 million hectares of forests are damaged each year in Europe and 9,000 hectares are dying due to acid rain in Italy. More than half of the 1,800 hectares of pine forests in Nanshan, Chongqing, China, have died due to acid rain.

3. Impact on the human body. First, heavy metals such as mercury and lead enter the human body through the food chain, inducing cancer and Alzheimer's disease; second, acid mist invades the lungs, induces pulmonary edema or leads to death; Third, long-term living in an environment containing acid deposits induces the production of excessive lipid oxide, which leads to an increase in the probability of diseases such as arteriosclerosis and myocardial infarction.

4. Corrosion of buildings, machinery and municipal facilities. In the United States alone, acid rain corrodes buildings and materials at a reported level of $2 billion per year. It is estimated that in 1988, only Sichuan, Guizhou and Liangguang and four provinces in China suffered a total economic loss of 14 billion yuan due to the death of forests, the reduction of crop yields, and the corrosion of metals due to acid rain.

1. It may cause flooding; Second, it may corrode buildings; 3. It may cause mudslides; Fourth, it may reduce crop yields; 5. It may lead to traffic accidents.

Rainwater is generally harmless to people.

Heavy rain can lead to traffic jams, landslides, mudslides and other natural disasters. Acid rain can erode many buildings. (see "acid rain" for details) causing a road surface to slip, resulting in a car accident.

Rain can contaminate the groundwater by carrying toxic substances from the soil into the groundwater. Excessive rainfall can cause water levels in reservoirs, rivers and lakes to skyrocket, causing flooding.

Rain, an indispensable part of the earth, is the only way for almost all terrestrial plants far from rivers to replenish fresh water. Rain irrigates crops and facilitates afforestation. Rain reduces dust in the air and lowers temperatures.

Rainfall is good for reservoir water storage, can replenish groundwater, can replenish river water, is good for power generation and shipping.

Mechanism of rain: Water vapor condenses into small water droplets when it encounters cold air at high altitude. These small droplets are small, with a diameter of only millimeters and a maximum of millimeters. They are small and light, held in the air by updrafts in the air.

It was these small droplets of water that gathered together in the air to form clouds. For these small droplets to fall to the ground as raindrops, they would have to increase in size by more than 1 million times. How do these small droplets grow their size to more than 1 million times?

It mainly relies on two means, one of which is condensation and condensation increase.

The above content reference:

If too much rainwater comes into contact with **, it will hurt ** to a certain extent. Rainwater is relatively dirty, if you look at it with a microscope, you will find a lot of debris, now due to the presence of carbon dioxide, sulfur dioxide, nitrogen dioxide, nitric oxide and other gases, the rainwater is obviously acidic, it is more harmful to the human body.

1. The main reasons for the damage of rain to ** are as follows:

1. Rain is not good for the human body, rain is easy to cause colds, arthritis and other diseases, if the amount of rainwater acid is high, it will erode or cause other diseases.

2. When it rains, the temperature will decrease and the humidity will increase, and arthritis patients and people who have undergone surgery will feel uncomfortable.

1. Eczema. If the legs are soaked in dirty water for a long time, the lower limbs are easily attacked by various microorganisms, so there may be erythema, pimples, and sometimes pus will seep out. In severe cases, blisters can appear on **, while children's ** are relatively tender, and contact with sewage is easy to cause eczema.

2. Athlete's foot. Causes a bacterial infection.

3. Inflammation. Humid conditions after a rainstorm can easily attract mosquitoes. Many people are bitten by mosquitoes, as if they have the feeling of insects crawling, and there will be small bumps on them.

4. Allergic disease. After the rain, the air is humid, if the clothes at home have not been dried, then germs will continue to breed, increasing the probability of allergies in the process of use.

Heavy rains can cause flash floods, dam failures, houses being washed away, farmland being submerged, and communications being disrupted.

1. Mountain flood outbreak: Heavy rain and flash flood often cause local floods because of the concentration of water and large flow velocity, strong erosion destructive power, and the water flow carries sediment and even stones.

2. Reservoir dam failure: In August 1975, due to the heavy rain caused by super typhoon Lianna, the upper reaches of the Huaihe River flooded, the rocky floodplain and Tiangang reservoirs collapsed, the Li River burst, and the Laowangpo flood storage area burst one after another. The Banqiao Reservoir overflowed and collapsed, with more than 600 million cubic meters of floods, and the flood peak more than five zhang high roared down, while the Zhugou medium-sized reservoir collapsed, the Boshan Reservoir overflowed, and 58 small reservoirs collapsed in just a few hours.

3. Houses are washed away: Floods and landslides caused by heavy rains can easily lead to the collapse of residents' houses.

4. Inundation of farmland: caused by too much rainfall in a short period of time, the embankment bursts and pipe surges occur in many places, resulting in the overflow of river water and the flooding of a large number of farmland.

5. Communication interruption: Due to the impact of large-scale and extremely heavy rainfall, some base stations are easily damaged, resulting in poor communication or even interruption.

1. Lightning strike.

Lightning strikes are common rainstorm weather disasters, often occur in places with many outdoor activities, and are not easily taken seriously, but their damage is huge.

2. Drowning. Heavy rain can lead to widespread water accumulation and flash flooding, and in this rainstorm disaster, there are also victims who drown due to being trapped in their cars.

3. Flash floods. Heavy rains can also cause flash floods.

Extended Information: Rainstorm Weather Considerations.

Precautions 1: There is a lot of water in the low-lying area in rainy weather, try to bypass the stagnant water when traveling back and forth, do not rush through the stagnant water place without verification, and pay attention to the observation when walking in the stagnant water. Prevent falling into wells or pits or holes.

Note 2: Bring rain gear when you go out.

Note 3: Due to the slippery road in rainy days, it is easy to fall, so it is advisable to go out slowly, and do not run fast.

Note 4: If the residential terrain is low-lying, it can be taken according to local conditions"Small surrounding"Measures such as building fences, placing water baffles at the gates, and configuring small pumps.

Precautions 5: Do not throw garbage, debris, etc. into the sewer to prevent blockage, resulting in water accumulation during heavy rains.

Note 6: For residents living on the ground floor, electrical sockets and switches should be moved to a place more than 1 meter above the ground to prevent water from overflowing.

Precautions 7: When lightning and thunder roar, the power supply should be cut off to prevent electric shock from hurting people.

Caution 8: Do not ride a bicycle when it is raining heavily. Be observant when walking in stagnant water. Prevent falling into manholes or pits or holes.

Note 9: When the driver encounters too deep water on the road or under the overpass, he should try to detour and avoid forcing through.

Precautions 10: In rainy days, the car turns off in a low-lying place, do not wait in the car, get out of the car and wait for rescue at a high place.

Heavy rains may cause disasters such as landslides and flooding of low-lying areas.

Persistent heavy rains often lead to flash floods, dam collapses, rivers overflow, houses are washed away, farmland is submerged, and transportation and telecommunications are interrupted, which will bring serious harm to the national economy and people's lives and property.

Persistent rainstorm weather is a serious natural disaster, which is mostly common in summer and autumn, and is extremely harmful. For example, prolonged heavy rains can cause landslides, mudslides, rapid water levels in rivers and lakes, dam collapses, houses washed out, farmland flooded, power and communication outages, and so on.

It has a serious impact on people's lives and production.

What are the hazards caused by a storm?

If it is a primary storm, it will cause water accumulation on the road surface.

If it is a moderate storm, it will not only cause water accumulation on the road, but also cause people to travel inconveniently, and with strong winds, the road surface will be a mess.

If it is a storm, it will not only cause water accumulation on the road surface, but also inundate the road surface, especially in low places. Extremely strong winds sometimes uproot large trees.

The above is my explanation, if there is anything wrong, please forgive me, after all, I am not a weatherman.

If you have different opinions, let's discuss them together! Bye.

The immediate hazard of heavy rains is flooding.

There are also indirect mudslides, landslides, flash floods, dam failures, etc.

This is a natural disaster that often occurs in the summer.

In the mountainous areas of the south, it is necessary to focus on prevention.

The rapid rise in water levels can easily cause flooding, and at the same time, waterlogging in cities is also prone to occur.

Heavy rains are prone to flash floods, and at the same time, the soil is loose, which is easy to cause natural disasters such as landslides and debris flows.

For crops, heavy rains can affect harvests, and even more so during flowering and pollination.

Heavy rains are definitely floods, and the continuous rains can also destroy crops, make urban drainage systems difficult, easily cause water accumulation, flood roads, and paralyze traffic.

A lot, for example, the most realistic one is to say that Yangshuo, Guangxi Province has been unable to travel recently, and many dealers, houses, cars, and shops have been flooded; It caused a lot of economic losses.

It will lead to natural disasters and cost people and money. At the very least, it affects the daily life of the family; On a large scale, it will affect the normal development of the country's economy.

1. Individuals.

inconvenience in life, which may lead to loss of life and property of individuals;

2. Country. Heavy rains and floods have caused people to suffer. At the same time, the infrastructure is damaged, which can bring the plague.

1. Flash floods.

2. Dam collapse of the reservoir.

3. The rivers flow crosswise.

Fourth, the house was washed down.

5. Farmland is submerged.

6. Interruption of transportation and telecommunications.

When it rains hard, people run faster when they collect their clothes For when it rains moderately, it is easy to slip and fall when running, and it is easy to get wet when it rains too much.

Traffic jams, floods, mudslides, and houses that damage people's lives are all serious hazards, which are natural disasters that can only be made up for after the disaster.

There are many harms, mainly causing flash floods, dam collapses, flooding fields, and loss of labor and money.

1. Hazards of washing before waterlogging. Due to the rapid and heavy rainfall, poor drainage is easy to cause water accumulation into waterlogging, soil pores are filled with water, resulting in lack of oxygen in the roots of terrestrial plants, so that the physiological activities of the root system are inhibited, for a long time, the root system produces toxic substances due to decay, so that the crop is damaged and the yield is reduced. 2. Flood disaster.

Floods caused by heavy rains inundated crops, leaving crops renewed.