2. 5 Natural Disasters
• Drought
• Flood
• Forest Fire
• Tornadoes
• Volcanic Eruption

5. • Drought is a period or condition of
unusually dry weather within a
geographic area where rainfall is
normally present. During a drought
there is a lack of precipitation. Droughts
occur in all climatic zones. However, its
characteristics vary significantly from
one region to another.

7. • We already know that a drought occurs
when not enough rain falls to the
ground.
• Or droughts occur because water vapor
is not brought by air currents to the right
areas at the right times.

9. Environmental
- Increased desertification - Damage to animal species
- Reduction and degradation of fish and wildlife habitat
- Lack of feed and drinking water
- Disease
- Increased predation.
- loss of wildlife in some areas and too many in others
- Increased stress to endangered species
- Damage to plant species
- Increased number and severity of fires
- Wind and water erosion of soils

10. Social
- Food shortages
- Loss of human life from food shortages, heat, suicides, violence
- Mental and physical stress
- Water user conflicts
- Political conflicts
- Social unrest
- Public dissatisfaction with government regarding drought
response
- Inequity in the distribution of drought relief
- Loss of cultural sites
- Reduced quality of life which leads to changes in lifestyle
- increased poverty
- Population migrations

14. • A form of natural disaster when
there is more water than the lakes,
rivers, oceans, or ground can hold

16. • Too much rain
• Excessive melting of snow
• Too much water for the ground to
absorb water
• Ice or other objects block the flow of
the river

18. • Damage property and homes
• Kill people and animals
• Communities in flood zones must be
rebuilt with proper flood controlling
equipment

22. • A forest fire is a natural disaster consisting of
a fire which destroys a forested area, and can
be a great danger to people who live in
forests as well as wildlife. Forest fires are
generally started by lightning, but also by
human negligence or arson, and can burn
thousands of square kilometers.

24. • Extinguishing fire improperly.
• Burning candles in tents.
• Burning crackers in the forest.
• Parking cars in the forest.
• Throwing industrial waste in the forest.
• Lighting cigarette in the forest.
• Accumulating dry leaves and bushes at
one place.

26. • Destroys in the vegetation of plants.
• Destroys in the vegetation of
animals.
• Destroys the water of lakes, rivers,
ocean and seas.

30. • A tornado is a powerful column of winds
spiraling around a center of low
atmospheric pressure. It looks like a
large black funnel hanging down from a
storm cloud. The narrow end will move
over the earth, whipping back and forth
like a tail.

32. • Tornadoes are formed when hot air and
cold air are mixed.
• The clouds grow larger and larger.
Finally, a thunderstorm is brewed up
with a strong updraft.
• The moisture in the warm air rises and
condenses into large clouds.

34. • Tornadoes can make People die.
• The tornado can destroy a lot of
homes, stores, and much more.
• It can make serious injuries.

38. • When a part of the earth's upper
mantle or lower crust melts, magma
forms.

40. • Low water, high silica (very viscous) - pasty lava -
often building domes.
• Low water, low silica - runny lava flows (not
viscous).
• High water, low silica(not viscous) - fountain of
runny lava.
• High water, high silica (very viscous) – explosion.

42. • Volcanic Ashes
• Debris Avalanches, Landslides, Tsunamis
• Blast
• Lava
• Types of Lava Flows
• Gas