Ethanol vapors leaked from piping caught fire and caused an explosion at the Poet Ethanol Plant in Glenville. Two out of four employees that were in the plant were injured. Significant damage to the facility

Source: A web-based collection and analysis of process safety incidents (https://www.sciencedirect.com/science/article/abs/pii/S0950423016302285)
Image Credit: Albert Lea Tribune