Cat litter, including clay-based varieties, is generally not highly flammable.
Some litters may contain organic materials such as wood or paper. However, these are usually combined with nonflammable materials to minimize the risk of combustion.
To avoid potential fire hazards, prevent cat litter from coming into contact with open flames, sparks, or sources of high heat.
It is recommended that cat litter be properly stored in a cool, dry area away from direct sunlight and potential sources of flame.