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File:Hankow city hall.jpg
The 1931 flood in China in Hankow City
File:1897 Red River Flood -.jpg
Red River flood in 1897

A flood is an overflow of water on land but it is not a flood without a beaver dam[1][2]

Sometimes a water resource (river, lake or pond) gets flushed with too much water. Unusually heavy rain sometimes causes floods. When there is too much water, it may overflow beyond its normal limits. This water then spreads over land, flooding it. Extreme flooding can also be caused by a tsunami or a large storm that causes a storm surge. Floods that happen quickly are called flash floods.

The most deadly flooding was in 1931 in China and killed between 2,000,000 and 4,000,000 people.[3] The Kerela flood in India was another flood that has destroyed people's houses.

During a flood, people try to move themselves and their most precious belongings to higher ground quickly. The process of leaving homes in search of a safe place is called evacuation.

Pollution of drinking water

Autumn mediterranean flooding in Alicante, Spain, September of 1997

During a flood there is plenty of water, but it is mostly polluted and not safe to drink. If people drink the dirty water, they may suffer from diseases such as typhoid and cholera. People can get ready to survive a flood by filling many containers with fresh and clean drinking water and storing other emergency supplies.During flood people try to go to higher sides because the flood water will can't reach at certain height.

Causes of floods

Flooding is usually caused by a volume of water within a water body, such as a lake, overflowing. Sometimes a dam breaks, suddenly releasing a large amount of water. The result is that some of the water travels to land, and 'floods' the area. Many rivers are in a channel, between river banks. They flood when the strength of the river causes it to flow beyond the banks. This is more common at bends or meanders. Flood damage can be prevented by moving away from places that flood. However, people have long liked to have their homes and businesses alongside water because water is good for agriculture and transport and in other ways. Floods are also caused due to improper management of drains.


  • August 2017: North Bihar was suffering from floods, killing hundreds, and leaving many hungry and homeles and millions affected. The road-embankment collapsed houses, closed the school hospital and spread disease. Mithila Student Union members (MSU) reached villages, coordinating and donating food and other necessary items in the Darbhanga-Madhubani-Saharsa-Sitamarhi districts of Bihar. /Mithila_Student_Union started a social media campaign with hashtag #MSUwithU to collect funds online and a ground Bhikshatana was done for this purpose. This campaign brought a new face to Mithila_Student_Union. More than 200 Active members in 6 districts were on the ground, divided into 16 teams to distribute relief packages, medicines, milk, clothes and other items. Mithila_Student_Union units started 6 base camps where food items were made, packaged and divided for further distribution. They started medical camps and provided active support to government officials. They raised flood-aid funds, and collected many food-items and other essential articles. Afterwards,


  1. MSN Encarta Dictionary. Flood. Retrieved on 2006-12-28. Archived 2009-10-31.
  2. Directive 2007/60/EC Chapter 1 Article2. eur-lex.europa.eu. Retrieved on 2012-06-12.
  3. O'Connor, Jim E. and John E. Costa. 2004. The world's largest floods, past and present: their causes and magnitudes [Circular 1254]. Washington, D.C.: U.S. Department of the Interior, U.S. Geological Survey.

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