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The Great Chicago Fire

Oct 8–10, 1871

A fire burns much of a wooden city

Confirmed Fires and floods · Verified 2026-10-31 · WWV-HS-DS-005

A fire swept through Chicago's wooden buildings and left about 100,000 people homeless. The story that Mrs. O'Leary's cow started it is not supported.

The exact cause is unknown.

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