What is the first stage of a fire when combustion begins and the fire is generally small and confined?

The first stage of a fire, when combustion begins and the fire is typically small and confined, is referred to as the ignition stage. During this stage, a heat source ignites combustible material, leading to the initial propagation of flames. This phase is crucial because it marks the transition from the absence of fire to the presence of a flame.

Understanding this stage is important because it can influence firefighting strategies; addressing a fire during its ignition stage can prevent it from growing into more dangerous stages, such as the growth or conflagration stages. Identifying and controlling this initial phase is key for effective fire prevention and response.