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DROUGHT

A natural hazard can be caused by lack of natural elements such as rain for the drought.Drought is an extended period of below normal precipitation and soil water draining deposits.Simply, this happens when more water is taken from a tank than added.This is usually a combination of persistent high pressure in a region that produces clear withlittle or non-existent rainfall and overuse of water for human activities.The results can be miscorarea chains drought, reducing water quality and the existence ofreducing drinking and food reserves. Thus, when the population is growing demand for foodand water and it is great, the implications of drought are becoming more serious.Also, the vegetation dies due to drought, increased fire risk, threatening homes, fields andlives. Drought and desertification cause or increase the planet's deserts

Hurricanes

Tropical cyclones are low pressure cell which originated more intensified and spend most oftheir "life" in the oceans. In the Atlantic, they are called hurricanes. Pacific Ocean are calledtyphoon.They are powered by high temperatures and moist air, when a hurricane moves ashore,

tends to lose its intensity. Tropical storms become hurricanes when wind passes of 74 km /h. In a hurricane, house doors and windows are broken by stones gathered by winds thatrotate in their middle. In some cases, hurricanes produce vortices that resemble those oftornadoes that can destroy entire buildings completely. Heavy rain and waves can causeflooding along the coast, threatening lives and private property.Erosion of the coast and even fires can be caused by hurricanes. Also, hurricanes can causecontamination of drinking water and interruption of utility services (electricity, gas,communications, transport).

Snow and ice

In the high atmosphere, rain is often initially frozen as snow or ice, even in summer. Inwinter, temperatures in the low atmosphere allow rainfall to remain in solid form.Snow and ice are well known hazards for those living in mountainous areas or in northernregions to 35 degrees north altitude. 18765itt51eqt7nProlonged interruption of electricity, road accidents, transportation delays and dangerousroads caused by snow and ice in winter. Snow can be wet, causing flooding or waterconditions and solid, in combination with rain causing icy.Frost and snow blizzard solid leads, combined with high winds. In many mountain areas,avalanches are a common hazard caused by snow. When large deposits of snow begin tomelt, flooding becomes imminent a hazard to populations living in the valley.

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Storms

Storms are plots organized by warm and humid air were forced to rise and produce lightningand thunder. They are common ways of nature to balance the amount of energy in theatmosphere.

Storms can create more dangerous phenomena: rain, strong winds, hail, lightning andtornadoes.In a storm, vertical movement of air occurs and a vast amount of energy is transferred.Winds from a storm in the area reach 80 km / h. Hail stones and chains can cause hugedamage to properties within a few seconds and can injure people and animals. Rainfallproducts are usually intense but short-duration floods are associated with this type ofprecipitation. Lightning is responsible for many victims each year. They also cause fires thatthreaten human lives and homes. Current interruption caused by lightning or winds cancause widespread interruption of daily activities of people.

Tornadoes:Tornadoes are rotating columns of air that is quickly associated with strong storms. A singlestorm can cause more tornadoes and tornado can have several vortices. Wind is the mainthreat for a tornado, with speeds exceeding 330 km / h.Aceste winds can destroy buildingsquickly and in some cases, whole communities. Is also associated with hail storms andtornadoes is also capable of causing enormous damage in a short time.Tornadoes can move up 100 km / h and remain in soil for several minute.Majoritateatornadoes occur between 16.00 and 18.00 when the lower atmosphere is most unstable.

Fires:

As groundwater flooding, fires in forests and wild areas are normal in many ecosisteme.Defact, fire plays an important role in some ecosystems like savannas preriile or oak. However,when fire threatens life or property, is considered a natural hazard. tq765i8151eqqtBesides normal threats of burning material causing hot flame, the fire can send largeamounts of ash into the atmosphere, causing inhibition of plant growth, reducing visibility andinterfering with respiratory problems.It may also be suitable for installation where landslides, destroying vegetation and leavingthe hillside vulnerable to Heavy rainfall after fire was extinguished. And wilderness fires arefires that extend many miles and burning for days and are caused by lightning or humanactivities such as smoking or camp fires.

Earthquakes:Earthquakes occur as a result of pressure released during faults. They are most commonalong tectonic plate boundaries but can occur almost anywhere. Earthquakes are commonlyassociated with volcanic activity. Even though it usually takes a few seconds, they can causedamage to large areas of buildings, water and gas pipes, electricity lines and roads andcommunications. The fire caused by gas pipes and power lines fall is a primary cause ofdamage in modern earthquakes. When earthquakes are triggered in an ocean or big lake, itcan form a tsunami to flood the surrounding coasts.

Floods:Floods are the volumes of water passing over the beds of rivers, lakes and coastal oceans,

sinking areas of land that usually were not submerged. They are natural events in the life ofevery lake, river or ocean. A flood can be caused by intense and prolonged rainfall, caused

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by storm waves, the collapse of dams, etc..Since most people living near the banks of a river, lake or ocean, floods are a major threat tohundreds of millions of people, causing loss of lives, property, contamination of drinkingwater, destroying crops and croplands. However, they can produce rich soils where cropscan recover.They can cause other hazards as landslides and even fire.Landslides:Landslides are major natural phenomena in many parts of the world. Such phenomenainclude falling rocks and landslides avalanse.Clasificare depends on how it moves andnature of the material moved.Landslides cause huge damage to roads, property and homes.They can cause other hazards as earthquakes, heavy rain or freezing water underground.

TsunamisHistorically, seismic waves of the ocean waves were incorrectly called tidal (sea). In fact,these phenomena are not related to tides in any way. Today, seismic waves are told

"tsunami" (translation from Japanese "harbor waves").Disasters are defined as ocean wave heights very large long-distance travel. They areindistinguishable within the oceans, but devastating to the ribs.However, tsunamis can exist inside large lakes and rivers caused by fault when anearthquake occurs.They are caused by any phenomenon that causes increasing height and water volume, suchas earthquakes, volcanic eruptions or landslides. They can cause large vessels near theocean shore far away, to flood the coast and the entire community with them when theyretire.Volcanoes:Volcanoes are craters on the earth's surface through which magma erupts, gas and other

materials. They are found in tectonic plate boundaries but there are the "hot areas" of theEarth, such as I-cles Hawaii.Some volcanoes erupt explosively, others slowly. Explosive volcanoes has many potentialthreats including toxic gases, pyroclastic wave (hot rock fragments and ash), burners clouds(clouds moving very fast and hot gas and ash containing fine) and a large amount of ash.Stones waves, earthquakes, floods, landslides, fires and other hazards can be caused byvolcanic eruptions.