The Great Chicago Fire of 1871 was one of the largest disasters in American history. In popular accounts from the time, Catherine O’Leary’s cow kicked over a lantern in a barn. The small flame became an inferno that destroyed miles of homes and burned Chicago’s business district to the ground.
More recently, in 2018, the Ranch Fire in California became the largest wildfire in the state’s history, killing a firefighter and burning over 410,000 acres. It was caused by a single spark from a hammer that someone was using to drive a metal stake into the ground.