This lesson covers essential steps to take to prepare for and react to a fire emergency. Learn how to create a fire escape plan, use a fire extinguisher, and ensure everyone's safety during an evacuation.A fire needs three things to ignite and sustain itself: heat, oxygen, and fuel. This is known as the Fire Triangle. Heat can come from anything that gets hot, like a stove or an electrical spark. Oxygen is in the air all around us. Fuel is any material that can burn, such as wood, paper, or gasoline. If you remove any one of these three elements, you can stop a fire.