A fire on Highway 162 west of Willows was quickly isolated to a single stack of straw.
The stack was identified through quality control procedures as wet straw and was removed and isolated due to its condition.
The fire is still under investigation, but it is believed to have been started from spontaneous combustion due to moisture, heat from the stack, and wind fueled conditions.
Multiple fire agencies responded and remain on scene.
It is not threatening any addition property.
The fire is expected to burn and smolder for several days.
Residents in the area are urged to use caution when traveling on Highway 162 due to smoke drifts.