FIRE!!!!!!!!!!!!!!!!!!!!!!!!!! The firefighters are here to save the day!
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- As you can see in the above scenario, there is an aerial water bomber that has collected water from a nearby dam and is dispersing water all over the blazing bushfires. This is one way that firefighters eliminate bushfires.
- How do bushfires start? Well...let me tell you this. Bushfires can be caused in numerous different ways both naturally or by people. These include: burning off/back burning, dry grass, sparks from machinery, camp fires, broken bottles, arson, cigarettes and when lightening strikes the bush/land.
- How do bushfires spread? As you may know, bushfires are a combination of fuel, oxygen and temperature (heat). There are three ways in which they spread: direct flame contact, burning embers and radiant heat. Direct flame contact occurs when flames interact with fuels that are unburnt that eventually cause a rise in temperature resulting them to ignite.
- In the above situation, a group of friends are having a relaxing barbeque together in one of their backyards on the deck. Unfortunately, the flame on the barbeque machine has gotten out of control. Luckily, a firefighter is able to hose down the flame. This is another way that firefighters put out a fire.
- In the above case, firefighters are using drip torches to carefully back burn along a firebreak to stop bushfires from spreading in their direction.
- That's right! and when there's strong winds, this causes the fire to spread very quickly. If the environment consists of natural materials like dried leaves, small branches, bark, twigs, shrubs and dry grass, this contributes to the spread of the bushfires.Burning embers are twigs and leaves that are burning and being blown in the wind causing small fires to start. If not put out, it can grow much bigger.Radiant heat is the heat released from a bushfire, causing the temperature of the fuel to rise enough for it to ignite.
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