Why is the preposition "into" used instead of "to"?

Native speaker’s answer
Rebecca
You could use either of these, and the sentence would remain the same. This meteorologist may have used "into" because she indicates direction and motion: the rain is moving towards the city of Alameda. The preposition "into" shows that something is moving and its direction, usually with the result of being enclosed or surrounded by something. In this scenario, the city of Alameda will be enclosed by rain. Ex: The concert was moved into the stadium because of the rain. Ex: We went into the store. Ex: Put the food into the fridge, please.