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A flood is an overflow of water that submerges land which is usually dry. The European Union defines a floods as a covering by water of land not normally covered by water Flood covering King Abdullah Street in Saudi Arabia.

The Central European flood of the Oder River in July 1997 affected Poland, Germany, and the Czech Republic. The flood caused the deaths of 115 people and material damages estimated at $4.5 billion. Osiedle Kozanów we Wroc ł awiu

An earthquake is the perceptible shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth's crust that creates seismic waves. Nepal earthquake

The 2010 Haiti earthquake was a catastrophic magnitude 7.0 earthquake, with an epicenter near the town of Leogane. Death toll estimates range from 220,000 to 316,000. Destroyed residential buildings in Haiti

A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. Mount Etna, Italy

The eruption of Mount Vesuvius in 79 AD was one of the most catastrophic and infamous volcanic eruptions in European history. Mount Vesuvius spewed a deadly cloud of volcanic gas, stones, and ash to a height of 33 kilometres, ejecting molten rock and pulverized pumice at the rate of 1.5 million tons per second. Mount Vesuvius, Italy

A tsunami, also known as a seismic sea wave, is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Tsunami, T ō hoku 2011

The earthquake triggered tsunami waves of up to 15 m waves devastated coastal villages and towns, as well as bathing visited at this time of the year by foreign tourists. The tsunami caused destruction on the coast of Indonesia, Sri Lanka and India and Thailand. Were killed about 300,000 people. Ao Nang, Thailand,

A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain. Depending on its location and strength, a tropical cyclone is referred to by names such as hurricane typhoon, tropical storm, cyclonic storm, tropical depression, and simply cyclone. Hurricane Isabel (2003) as seen from orbit

Hurricane Katrina was the eleventh named storm and fifth hurricane of the 2005 Atlantic hurricane season. It was the costliest natural disaster, as well as one of the five deadliest hurricanes, in the history of the United States. The storm is currently ranked as the third most intense United States landfalling tropical cyclone. Hurricane Katrina on August 28, 2005