After a dry summer, fire spread rapidly through a city built overwhelmingly of wood — including sidewalks and roads. Strong winds carried burning debris across firebreaks and the Chicago River.
Roughly 300 people died, 100,000 were left homeless and about 17,500 buildings were destroyed. Rebuilding drove the adoption of fire-resistant construction, professional fire services and eventually the steel-frame high-rise.
Why this event still matters
Historical incidents shape the rules that protect people today — building codes, evacuation policy, warning systems and inspection regimes almost always trace back to a specific disaster. Studying Great Chicago Fire alongside current events is how preparedness improves.
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