Types of Fire and Flashovers

Fire is the rapid oxidation of matter. It is a chemical process that releases heat, light, and various reaction products. These products are all harmful. Listed below are the characteristics of fire. Learn to recognize them in case of an emergency. This article will explain the types of fire and what to do if you suspect that there may be a flashover. But before you begin your fire safety training, be sure to check the classification of the fire in your area.


The term “combust fire” comes from the process of burning a substance with oxygen and heat. The flame then heats up the surrounding atmosphere, which expands to provide more oxygen to the burning fuel. Cold air falls to the bottom of the flame, while hot air rises. This upward air flow feeds the fire with fresh oxygen, and it gives the flame its teardrop shape. If used appropriately, this effect can produce significant amounts of damage.


The classification of fire helps firefighters choose the best extinguishing agent and the correct precautions for different types of blazes. For example, Class A fires are organic and combustible materials. They can be put out with water or Dry Chemical Powder (DCP). Class B fires are flammable liquids. These include oil-based paints and grease. Water is an ineffective firefighting agent in Class D fires.

Chemical reactions

The fundamental concept behind fire is that it is a self-sustaining process that involves oxygen and wood logs. As a result, the fire will produce heat and light. This uninhibited chain reaction occurs when fuels such as wood and fuel oil are exposed to oxygen. The combustion process can be accelerated by increasing the temperature of the fuel and oxidizer, which both contribute to fire’s growth and spread. But if the fire source and fuel oil are not available, the fire will eventually die out.

Signs of a flashover

A flashover is a rapid and severe event involving large amounts of fire in one compartment. It occurs when there is no shortage of oxygen in a compartment and the fire rapidly reaches the neutral plane and moves toward the floor. Flashover firefighters call it “Angel Fingers” and learn to recognize it by memorizing a chant. Firefighters must understand and avoid the signs of flashover to avoid the incident.


The first line of defense against fire is prevention. Firefighting efforts focus on minimizing the effects of the blaze on the structure and people exposed to it. Usually, the plan of action for managing persons exposed to fire is to evacuate them as quickly as possible. The evacuation is made safe with a well-planned fire escape route. Keeping the area safe for emergency personnel is essential as well. The following steps will help you prevent fires and save lives.