Being a fire warden also entails having a basic understanding of the types of fires there are. Class A fires involve solid materials such as wood, paper, rubber, plastic and cloth. Class B fires involve flammable or combustible liquids, such as petrol, oil and paint. Class C fires involve flammable gases, such as propane, butane and methane. Class D fire involve flammable metals, such as potassium, aluminum and titanium. Class F fire involve cooking oils and fats. It is important for fire wardens to have this knowledge so that they can properly assess the risks involved in any given fire situation and provide the appropriate fire safety training to employees.