2. DISASTER
• Disaster is an overwhelming disruption
occuring on a scale sufficient to require
outside assistance. -PAHO 1980
• Disasters are exceptional events which kill
large number of people. -RED CROSS
3. WHAT IS A DISASTER
• Extreme weather events
• Extreme geologic event
• Industrial mishaps
• Famine
• Major populaton displacement
4. NATURE OF DISASTER
• It may occur suddenly in Time.
• May develop over a period of time.
9. Tornadoes
• Rotating, funnel-shaped clouds from powerful
thunderstorms
• Winds up to 300 MPH capable of producing major
damage
• More occur in the United States than anywhere
else in the world; they occur in every state in
America.
12. Hurricanes
• Massive severe storms occurring in the tropics
• Winds greater than 75 MPH
• Clouds & winds spin around the eye
• Produce heavy rains, high winds, large waves, and
spin-off tornadoes
• :
13. Effects of Alabama Hurricanes
Hurricane Frederick - 1979 Hurricane Ivan 2005
15. Earthquakes
• Shaking caused by movements of plates in the
earth’s crust
• Occur along faults – borders between two
plates
• Occur most often along the Ring of Fire
16.
17. Volcanoes
• More than 500 active volcanoes in the
world; over half in the Ring of Fire
• Pressure builds below the earth’s surface
producing eruptions of lava, rock, and
volcanic gases
19. Floods
• Result from heavy rains
• May involve rivers overflowing, storm
surge/ocean waves, & dams or levees
breaking
• Most common natural hazard
• Flashfloods = floods that happen very
fast
22. Tsunamis
• Form as a result of earthquakes, volcanoes, or
landsides under the ocean
• Waves grow taller as they reach the coast
• Four out of Five occur in the Ring of Fire
• Over 200,000 people killed in the 12/26/05 Indian
Ocean tsunami
24. Winter Storms
• May include snow, ice storms, sleet,
freezing rain, and extremely cold
temperatures
• Most deaths occur in automobiles
• Storms may cause widespread power
outages
25. Wildfires
• Occur in forests, grasslands, and wooded
areas
• Most common causes: lightning and human
accidents
• Burn more than 4 million acres in the U.S.
each year
28. Biological Threats
• A biological attack is a release of germs or
other biological substances. Many agents must
be inhaled, enter through a cut in the skin or
be eaten to make you sick. Some biological
agents can cause contagious diseases, others
do not.
• Anthrax virus,Ebola virus.
29. Chemical Threats
• A chemical attack is the deliberate release
of a toxic gas, liquid or solid that can
poison people and the environment.
• Chemical spills can also wreak havoc on
the environment.
• Ex:Bhopal tragedy a toxic gas is released
i.e; methyl iso cyanide.
30. Nuclear Threats
• Nuclear threat that occur recently in
japan.
• Che mobyl nuclear accident.
Radiation Threats•.
•It is NOT a nuclear blast.
•The force of the explosion and radioactive contamination.
will be more localized.
31. SOME OTHER EXAMPLES OF
MAN MADE DISASTERS.
• Hiroshima and nagasaki atomic blast.
• Open oil spills in gulf of mexico.
