1. Wisconsin becomes a state: On October 31, 1848, Wisconsin officially became the 30th state to join the United States. The state had been a part of the Michigan Territory until it was granted statehood.

2. The deadliest fire in Wisconsin history: On October 31, 1871, a massive fire broke out in Peshtigo, Wisconsin, and swept through the surrounding area. The fire destroyed over 1.2 million acres of land and claimed the lives of over 1,500 people, making it the deadliest fire in Wisconsin history.

3. Harry Houdini's last performance: On October 31, 1926, legendary illusionist Harry Houdini gave his final ever performance in Madison, Wisconsin. He died of peritonitis just a few days later in Detroit, Michigan.

4. Herb Kohl becomes Senator: On October 31, 1988, Herb Kohl was elected to the United States Senate, where he would serve for four terms until his retirement in 2013. Kohl was also the owner of the Milwaukee Bucks basketball team for over 20 years.

5. First official snowfall: On October 31, 1917, the first official snowfall of the season was recorded in Milwaukee, Wisconsin. The city received 0.7 inches of snow, making it the earliest snowfall on record for Milwaukee.