Generally, for a fire to occur, three elements are needed: Heat, Fuel and Oxygen.The aim of fire prevention is to avoid these three coming into contact. A fire can be prevented or extinguished by removing any one of the elements in the fire triangle.
Heat: The first element in the fire triangle is heat, which is perhaps the most essential of fire elements. A fire cannot ignite unless it has a certain amount of heat, and it cannot grow without heat either..
Fuel: The second element in the fire triangle is fuel. A fire needs a fuel source in order to burn. The fuel source can be anything that is flammable, such as wood, paper, fabric, or chemicals. Once the fuel element of the fire triangle is removed, the fire will go out.
Oxygen: The final element of the fire triangle is oxygen, which is also an essential component of fire. A fire needs oxygen to start and continue. That is why one recommendation for extinguishing a small fire is to smother it with a non-flammable blanket, sand or dirt.