Today marks the 141st anniversary of the Great Chicago Fire. It also coincides with another starting date. Last week was the 25th anniversary of a program aimed to save lives in the event of a fire. “Change Your Clock, Change Your Battery” is a reminder to make sure your smoke detector is working.

“In order for the smoke detectors to work they must have good batteries, and that is why we ask you to make sure your smoke detector batteries are changed every spring and fall and at the same time that we change our clocks on a regular interval we must change our batteries,” said Chicago Fire Commissioner Jose Santiago.

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The Chicago Fire, which started in a barn, destroyed much of the city. Even though the barn was close to the owner’s home, the house came away unscathed.

The home has since been razed and in its place today stands the Chicago Fire Department training academy. The cause of the fire, which by legend started when a cow kicked over a lantern, has never been found.

(Copyright WBGZ Radio/