Fire can be classified according to the materials implicated in its origin.
- Class A fire - Fires involving ordinary combustible materials like wood, paper, cloth, furnishing, plastics, rubber,etc., usually of an organic nature, in which combustion normally takes place with the formation of glowing embers.
- Class B fire - Fires involving flammable liquids, solvents, oils, paints, thinner and liquefiable solids.
- Class C fire - Fires involving flammable gases.
- Class D fire - Fires involving combustible metals, eg, potassium, magnesium, titanium, sodium, lithium and zirconium.
- Class F fire - Fires involving cooking media (vegetable or animals oils and fats) in cooking appliances.