Signs of a fire include ASHES, which are the remains of a fire after it has been extinguished. Smoke is another sign of a fire, as it is produced when a fire is burning. Flames are also a sign of a fire, as they are the visible part of the fire. Heat is another sign of a fire, as it is produced by the combustion of materials. Finally, sparks are another sign of a fire, as they are small pieces of burning material that can be seen flying through the air.