I've only taken floods among all natural disasters. The example of floods is of Sindh, Pakistan.

1. Natural
Disasters
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2. Natural Disasters
A natural disaster is the effect of a
natural hazard (e.g., flood, tornado,
hurricane, volcanic erruption,
earthquake, heatwave, or landslide). It
leads to financial, environmental and
human losses.
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3. Floods
A flood is an overflow of an expanse of water that
submerges land. A flood is a temporary covering of
land by water not normally covered by water. Flooding
may result from the volume of water within a body of
water, such as a river or lake, which overflows or breaks
levees, with the result that some of the water escapes its
usual boundaries. While the size of a lake or other body
of water will vary with seasonal changes in precipitation
and snow melt, it is not a significant flood unless such
escapes of water endanger land areas used by man like a
village, city or other inhabited area.
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4. 2011 Floods in Sindh
 The 2011 Sindh floods began during the Pakistani
monsoon season in mid-August 2011, resulting from
heavy monsoon rains in Sindh, eastern Balochistan, and
southern Punjab.
 The floods have caused considerable damage; an
estimated 434 civilians have been killed, with more than
5.3 million people and 1.5 million homes affected.
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5. Continue…
 The flooding follows the previous year's
historic 2010 Pakistan floods, which
devastated the entire country.
Unprecedented torrential monsoon rains
caused severe flooding in 16 districts of
Sindh province.
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6. Continue…..
 Sindh is a fertile region and often called the
"breadbasket" of the country; the damage
and toll of the floods on the local agrarian
economy is said to be extensive.
 At least 1.7 million acres of arable land
have been inundated as a result of the
flooding.
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7. How to Prevent from the Floods
 By making more Dams.
 By planting trees along the rivers and canals.
 By proper maintenance of rivers and canals.
 By strengthening the banks of the rivers.
 By maintaining drainage systems.
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8. How to Prevent from the Diseases
 By shifting affected people to safer places.
 By Vaccination of common diseases.
 By providing immediate medical care.
 By draining out of the stagnant waters.
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9. How to save the country from flood
damages and losses.
 To establish disaster relief organizations.
 To train the disaster relief workers.
 By creating awareness in the people for the
rescue.
 By strong communication.
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10. Economic Affects
 The crops and cattles got expensive and in lack amount.
 Industries based on agriculture and cattle ranching got
in loss.
 A number of houses and industries got damaged.
 It will lead to the damages of roads, collapse of bridges
or traffic congestion.
 Inflation.
 Resources used in reconstruction.
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11. Social Affects
 A large part of population displaced from their
homes.
 Increase in unemployment.
 A huge destruction of educational institutions
caused long break in education of children.
 Spread out of numerous diseases, which take
long time to recover.
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