2. Disaster management
Prepared by vishnu

3. drought
drought About drought
• Droughts occur in virtually all
climates. Of all the weather-
related phenomena that can
cause severe economic impacts
in the United States, droughts
come in second only to
hurricanes, according to the
National Climatic Data Center.

4. earthquake
earthquake About earthquake
• There are large earthquakes
and small earthquakes. Large
earthquakes can take down
buildings and cause death and
injury.
• An earthquake (or quakes,
tremors) is shaking caused
by sudden movements
of rocks in the Earth's crust.
They can be extremely violent.

5. floods
floods About floods
• A flood is an overflow of water on
land which is usually dry.[1][2]
• Sometimes a river receives too much
extra water, either from heavy rain or
other natural disasters. When this
happens, the water overflows from its
normal path in the river bed and onto
dry land. This is called a flood. Flash
floods happen quickly. Extreme
flooding can also be caused by
a tsunami or a large storm that will
cause the sea to surge inland.

6. tsunami
tsunami About tsunami
• Earthquakes, volcanic eruptions and
other underwater
explosions (including detonations of
underwater nuclear devices),
landslides, glacier calvings, meteorite
impacts and other disturbances above
or below water all have the potential
to generate a tsunami.[4] Unlike
normal ocean waves which are
generated by wind ortides which are
generated by the gravitational pull of
the Moon and Sun, a tsunami is
generated by the displacement of
water.

7. tornado
tornado About tornado
• A tornado is a violently rotating column
of air that is in contact with both the
surface of the earth and a cumulonimbus
cloudor, in rare cases, the base of
a cumulus cloud. They are often referred
to as twisters or cyclones,[1] although the
wordcyclone is used in meteorology, in a
wider sense, to name any closed low
pressure circulation. Tornadoes come in
many shapes and sizes, but they are
typically in the form of a
visible condensation funnel, whose
narrow end touches the earth and is
often encircled by a cloud
of debris and dust.

8. volcano
volcano About volcano
• A volcano is a mountain where lava (hot, liquid rock)
comes from a magma chamber under the ground.[1]
• Most volcanoes have a volcanic crater at the top. When a
volcano is active, materials come out of it. The materials
include lava,steam, gaseous sulfur compounds, ash and
broken rock pieces.
• When there is enough pressure, the volcano erupts.
Some volcanic eruptions blow off the top of the volcano.
The magma comes out, sometimes quickly and
sometimes slowly. Some eruptions come out at a side
instead of the top.
• Volcanoes are found on planets other than Earth. An
example is Olympus Mons on Mars.
• Volcanologists are scientists who study volcanoes using
methods from geology, chemistry, geography, mineralogy,
physics and sociology.

9. How to control disasters

10. Thank you