A massive fire in Cloquet, Minn., in October 1918 left the town in ruins. Dry conditions and sparks from the railroad caused the fire. It was the worst natural disaster in the history of Minnesota. According to the Minnesota Historical Society, 1,000 people died and 52,000 people were injured or displaced. The fire wiped out 38 communities, burned 250,000 acres and caused $73 million in property damage.