today we’ll learn about floods floods
are a natural event in which a dry area
or a dry piece of land suddenly gets
submerged under water
it simply means too much water
everywhere even around our houses
flooding is very dangerous the
overflowing water carries along objects
like houses bridges furniture trees
farms animals even people sometimes it
carries a whole city so dangerous the
natural behavior of water is that it
moves from higher ground level to lower
ground level this means the lower ground
is a lot more likely to experience
flooding let’s learn the main reasons
for flooding rain whenever it rains
heavily and there is less drainage
flooding occurs overflowing rivers when
there’s more water upstream than usual
and as it flows downstream to the
low-lying areas or flood plains the
excess water flows into the land causing
flooding breaking of dams when there’s
too much water behind a dam the force of
water breaks it causing overflowing of
water which results in flooding strong
winds sea water can be carried by strong winds
and hurricanes onto dry coastal lands
which results in flooding sometimes the
winds carry rains by themselves tropical
cyclones and hurricanes can produce
rains which caused massive flooding
melting snow when the temperature rises
ice melts resulting in immense movement
of water into dry places there are four
main types of floods
flashfloods rapid onset floods slow
onset floods and storm surge flooding
flash floods a flood which develops in
less than six hours is called a flash
flood they can occur almost everywhere
but most commonly in low altitude areas
with poor drainage systems there’s
mostly no warning and no preparations so
the impact can be devastating rapid
onset floods rapid onset floods lasts
for usually one or two days and cause
more damage as people usually have less
time to plan their evacuation slow onset
floods they tend to develop slowly and
can last for days and even weeks this
type of flood tends to give people time
to move to higher ground slow onset
floods occur in Bangladesh every year
causing many diseases storm surge
flooding this happens during a storm
hurricane or cyclone it is a strong wave
of water that sweeps on to land it’s an
incredibly dangerous threat for people
living along the coast it was severe in
New Orleans USA during Hurricane Katrina
in 2007 the results of floods are
devastating we should try our best to
follow some safety tips before during
and after flooding some of them are if
you have pre information about flooding
be prepared to evacuate turn off the gas
and electrical appliances try going to a
place that is on higher ground stay away
from power lines and power cables keep a
list of emergency contacts with you use
extreme caution when entering buildings
after a flood flood damage is generally
long-term many times floods can destroy
everything always help others if you can
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