On the night of October 8, 1871, a whirlwind of fire swept through northeastern Wisconsin, destroying the bustling frontier town of Peshtigo. Trees, buildings, and people burst into flames. Metal melted. Sand turned into glass. People thought the end of the world had come. When the "tornado of fire" was over, 2,500 people were dead, and Peshtigo was nothing but a smoking ruin. It was the deadliest wildfire in U.S. history. The Great Peshtigo...