Pikuai answers~
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The Chicago fire is claimed to be the most famous in American history. It killed 300 innocent people and destroyed over 17,000 buildings. Cover well over 3.5 square miles of land. The damages it created were very costly, around $200 Million worth. Many people were homeless and 1/3 of the city was left in ruins.
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(don't worry, it's not copy and pasted. I wrote it all myself)
I hope this helps, have an awesome day!~