WFR responded to a house fire this morning at 0857. The home located at 321 11 St NW was occupied at the time, the caller reported smoke coming from a light fixture. Upon arrival, fire fighters found a small fire in the attic caused by the water heater chimney. Crews quickly extinguished the fire keeping damage to a minimum. Fire fighters were on scene approximately one hour. No injuries were reported. The cause is under investigation. BC McElhany.