What type of fire can be extinguished using water?

Class A fires are characterized by ordinary combustibles such as wood, paper, cloth, and some types of plastics. Water is effective in extinguishing these types of fires because it cools the burning material and removes the heat necessary for combustion. When water is applied, it can reduce the temperature of the fire and subsequently extinguish it.

Using water for Class A fires also involves its ability to soak into the material, helping to penetrate and cool the embers or material that may continue to smolder after the fire seems to be out. This makes water a versatile and common agent for managing fires involving ordinary combustible materials.

In contrast, using water on Class B (flammable liquids) fires could cause the liquid to spread, potentially making the fire worse. Class C fires, which involve electrical equipment, pose a risk of electric shock when water is introduced. Lastly, Class D fires involve flammable metals that may react violently with water. Thus, water is specifically suited to Class A fires due to its cooling and smothering properties.