In the NFPA fire diamond, which diamond indicates the flammability hazard of a material?

In the NFPA fire diamond, the top diamond is specifically designated to represent the flammability hazard of a material. This diamond uses a scale from 0 to 4, where 0 indicates that the material will not burn and 4 shows that it is extremely flammable. By providing valuable information about how easily a material can ignite, the top diamond helps emergency responders assess the fire risk associated with various substances quickly. Understanding the flammability hazard is crucial for safety protocols, as it influences how materials should be handled, stored, and transported in order to mitigate fire risks effectively.