At approximately 6:58pm this evening, fire crews from Oakdale and Escalon responded to a report of a grass fire on Lone Tree Road, just east of Henry Road. The fire was burning in a field of short grass with a mix of dry and green grasses. The cause of the fire was uncertain, but may have been started by sparks from a passing automobile. The fire consumed only a few acres before fire personnel put it out. There was no damage to any structures. Fire season is under way and property owners should prepare defensive space around outbuildings and homes. Remember to use caution when cutting dry fields.