Class A fires involve ordinary combustible materials such as wood, paper, cloth, and some plastics. These materials ignite easily and can produce ash when burned. Class A fires are common in homes and workplaces, making them a significant concern for fire safety. To extinguish a Class A fire, water is typically the most effective method, as it cools the burning material and reduces the heat. Fire extinguishers labeled with a green triangle are specifically designed for Class A fires, ensuring that individuals can quickly identify the right tool for the job.