How would you have handled this "nude child" situation?

It was a hot summer day. The temperature was around 95 degrees. A fire hydrant had been illegaly opened and the children were enjoying the cool hydrant water. All the children were wearing clothes, except one…..a six year old male. He was completely nude and dancing in the water. His mother was advised to put some clothes on her son. The fire department was called to shut off the fire hydrant. An hour later, the fire hydrant had been illegaly opened again and this same child was again dancing in the street, nude. The mother was arrested for contributing to the delinquency of a minor and indecent exposure. Question: was this situation handled properly by the police? Could there have been another avenue of resolving this situation?