A presentation about natural disasters

1. Natural Disasters

2. Cyclones, Hurricanes and Typhoons are powerful storms that have winds in excess of 119 kilometres per hour (74 MPH).
These wind storms can develop either as a result of a confluence of warm and cold winds over the ocean following a
thunderstorm or when differing areas of wind pressure conflict. Due to this, they most commonly occur during the summer
months between June and November.
On average there are between 80-100 of these storms each year, and while only a fraction of these approach land they can
cause devastation once they do.
Property damage is the most common after-effect, with windows, roofs and doors succumbing to the powerful winds battering
them, and the most powerful storms can tear down small buildings. Thus, without a solid foundation, objects and people are at
risk if they are caught in the winds.
Since the 1950s, storms that approach land are given official names so that meteorologists can track them. The names
alternate between male and female and in ascending alphabetical order from the start of each season.
A storm is generally referred to as a Cyclone, Hurricane or Typhoon based on where the storm takes place.
Cyclones

3. ● An earthquake is a jolt or shoulder like movement of the
Earth's surface.
● Less violent earthquakes are known as tremors.
● Earthquakes and Earth tremors are caused by releasing of the
energy stored in the Earth's crust.
● Earthquakes bring heavy damages to man-made creations on
Earth.At the Earth's surface, earthquakes manifest
themselves by shaking and displacing or disrupting the
ground
Earthquake

5. 1. A wildfire (AKA forest or peat fire) is an uncontrolled fire. Wildfires often occur in (duh) wild,
unpopulated areas, but they can occur anywhere and harm homes, agriculture, humans, and
animals in their path.[1]
2. Firefighters also refer to these disasters as surface fires, dependent crown fires, spot fires, and
ground fires. Want to make local firefighters happy -- and even better at their jobs? Bake
cookies to say thanks! Sign up for Cookies for Heroes.[2]
3. 90% of all wildfires are started by humans.[3]
4. “Crown fires” are spread by wind moving quickly across the tops of trees. “Running crown fires”
are even more dangerous because they burn extremely hot, travel rapidly, and can change
direction quickly.[4]
5. One of the largest fires in recent history was in 1825 when a fire tore through Maine and New
Brunswick, Canada, burning 3 million acres of forest.[5]
6. Weather conditions can directly contribute to the occurrence of wildfires through lightning
strikes or indirectly by an extended dry spell or drought.[6]
7. Wildfires can be caused by an accumulation of dead matter (leaves, twigs, and trees) that can
create enough heat in some instances to spontaneously combust and ignite the surrounding
area.[7]
8. Lightning strikes the earth over 100,000 times a day. 10 to 20% of these lightning strikes can
cause fire.[8]