Natural Natural DisastersDisasters

Types of Natural DisastersTypes of Natural Disasters TornadoesTornadoes HurricanesHurricanes EarthquakesEarthquakes Volcanoes Volcanoes FloodsFloods TsunamisTsunamis Winter StormsWinter Storms WildfiresWildfires

TornadoeTornadoess

Rotating, funnel-shaped clouds from powerful Rotating, funnel-shaped clouds from powerful thunderstorms.thunderstorms.

Winds up to 300 MPH capable of producing Winds up to 300 MPH capable of producing major damage.major damage.

More occur in the United States than anywhere More occur in the United States than anywhere else in the world; they occur in every state in else in the world; they occur in every state in America.America.

Effects of TornadoesEffects of Tornadoes

Tuscaloosa County: December 16, 2000Tuscaloosa County: December 16, 2000

HurricaneHurricaness

Massive severe storms occurring in the tropics.Massive severe storms occurring in the tropics. Winds greater than 75 MPH.Winds greater than 75 MPH. Clouds & winds spin around the eye.Clouds & winds spin around the eye. Produce heavy rains, high winds, large waves, Produce heavy rains, high winds, large waves,

and spin-off tornadoes.and spin-off tornadoes.

Effects of HurricanesEffects of Hurricanes

Hurricane Frederick - 1979Hurricane Frederick - 1979 Hurricane Ivan 2005Hurricane Ivan 2005

EarthquakesEarthquakes Shaking caused by movements of plates in Shaking caused by movements of plates in

the earth’s crust.the earth’s crust. Occur along faults – borders between two Occur along faults – borders between two

plates.plates. Occur most often along the Occur most often along the Ring of FireRing of Fire..

Effects of EarthquakesEffects of Earthquakes

VolcanoesVolcanoes More than 500 active volcanoes in the More than 500 active volcanoes in the

world; over half in the Ring of Fire.world; over half in the Ring of Fire. Pressure builds below the earth’s Pressure builds below the earth’s

surface producing eruptions of lava, surface producing eruptions of lava, rock, and volcanic gases.rock, and volcanic gases.

Effects of VolcanoesEffects of Volcanoes

FloodsFloods Result from heavy rains.Result from heavy rains. May involve rivers overflowing, storm May involve rivers overflowing, storm

surge/ocean waves, & dams or surge/ocean waves, & dams or levees breaking.levees breaking.

Most common natural hazard.Most common natural hazard. Flashfloods = floods that happen Flashfloods = floods that happen

very fast.very fast.

Effects of FloodsEffects of Floods

TsunamisTsunamis Form as a result of earthquakes, volcanoes, or Form as a result of earthquakes, volcanoes, or

landsides under the ocean.landsides under the ocean. Waves grow taller as they reach the coast.Waves grow taller as they reach the coast. Four out of Five occur in the Ring of Fire.Four out of Five occur in the Ring of Fire. Over 200,000 people killed in the 12/26/05 Over 200,000 people killed in the 12/26/05

Indian Ocean tsunami.Indian Ocean tsunami.

Effects of TsunamisEffects of TsunamisIndian Ocean Tsunami – December 26, 2005Indian Ocean Tsunami – December 26, 2005

Winter Winter StormsStorms

May include snow, ice storms, sleet, May include snow, ice storms, sleet, freezing rain, and extremely cold freezing rain, and extremely cold temperatures.temperatures.

Most deaths occur in automobiles.Most deaths occur in automobiles. Storms may cause widespread power Storms may cause widespread power

outages.outages.

Effects of Winter StormsEffects of Winter Storms

WildfiresWildfires Occur in forests, grasslands, and Occur in forests, grasslands, and

wooded areas.wooded areas. Most common causes: lightning and Most common causes: lightning and

human accidents.human accidents. Burn more than 4 million acres in the Burn more than 4 million acres in the

U.S. each year.U.S. each year.

Effects of WildfiresEffects of Wildfires

Thank you for Thank you for Watching!Watching!A Presentation By:A Presentation By:S.V.KeerthiprithviS.V.Keerthiprithvi

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