People are the church
Throughout the Bible scriptures, it’s “church” or “congregation,” not a “building.” Church (the body of Christ) or the church (a congregation) or members of the church is made up of people called to follow Jesus Christ. The church is made up of disciples or students of Jesus Christ who convene to receive God’s instructions.
If they are meeting in a building and the building catches fire, the congregation gets outside. The building burns, but the church is outside. The church can meet in a home, etc.—anywhere.