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What's Peshtigo? A small speck of a lumber town about 250 miles north of Chicago, near the western shores of the Bay of Green Bay.

Painting of Peshtigo Fire

Conditions were ripe in the area in the fall of 1871, owing to an unusually dry summer. Small prairie fires were common and either burned themselves out or were quickly quenched. Loggers tried to to hold their slash burning to small areas. Some farmers needed to burn small piles of brush that had accumulated from clearing land for additonal crop-growing acreage. And a railroad was being constructed at that time, between Michigan's Upper Peninsula and Milwaukee, Wisconsin. This necessarily left debris to the sides of the track.

The Peshtigo paradigm

A cold front moved across a broad expanse of north central America that day, which brought swirling winds that allowed small fires to combine into larger ones. Circumstances, such as this wind, the topography of the area, and the abundant fuel, all came together to create a perfect setting for a catastrophic event. As the temperature rose, so did the wind's intensity. A firestorm, in essence "nature's nuclear explosion," burst into being.

The firestorm, whipped by what is today acknowledged to have been a low-grade tornado, was described as "a wall of flame, a mile high, five miles wide, traveling 90 to 100 miles an hour, hotter than a crematorium, turning sand into glass." It destroyed 12 pioneer towns and about 1.5 million acres, or nearly 2,000 square miles, of prime timber, and killed an estimated 2,200 people.

Traveling in a northeasterly direction, the fire leapt the Peshtigo River and burned a swath through the countryside before reaching the waters of Green Bay, where it finally died out.

An obscure disaster

Why does the largest and deadliest fire in the history of the United States go largely unnoticed?

US Weather Bureau map

Because on this very date, October 8, 1871, Mrs. O'Leary's cow supposedly kicked over the lantern. Yes, The Great Chicago Fire, which consumed 2,000 acres and claimed 300 lives, also occurred on this date — as did fires in Manistee, Saugatuck, and Holland, Michigan — and stole the spotlight from the Peshtigo fire, in part because communications to the rest of the world were better from those places.

Comet or coincidence? Fragment or figment?

Some scientists theorize that fragments of the expiring Biela's Comet survived entry into the earth's atmosphere and simultaneously set off fires around Lake Michigan. While it is tantalizing to try to connect the seemingly unconnectible events that occurred on that fateful day and night, there is no scientific evidence that ties these events together.

Off-site search results for "Great Peshtigo Fire"...

The Great Chicago Fire
... fire The Great Chicago Fire October 9, 1871 If you woke up and your house was on fire, what would you take with you before getting out? You might be surprised at some of the things you might grab in the middle of the night.On October 8, 1871 ...
http://www.americaslibrary.gov/cgi-bin/page.cgi/jb/recon/chicago_1

The Great Fire of London
... I did see the houses at the end of the bridge all on fire, and an infinite great fire on this and the other side ... of the bridge ... . So down [I went], with my heart full of trouble, to the Lieutenant of the Tower, who tells me that it ...
http://www.historynet.com/bh/blgreatfirelondon

Chicago History: The Great Chicago Fire
That is why the Water Tower still stands today. When the fire was over, 300 people of the 300,000 in Chicago were killed, 100,000 were left homeless, 17,500 buildings were destroyed, 73 miles of street were destroyed and $200 million of property ...
http://library.thinkquest.org/CR0215480/fire.htm

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