Gas leaks from ruptured or leaking propane lines are the leading cause of such explosions in mobile homes. All it takes is a spark. https://www.fox6now.com/news/wisconsin-christmas-mobile-home-explosion-no-injuries
136,007 Car Crashes Per Year In Wisconsin
During the last six years of available data, total crashes averaged 136,007 on Wisconsin roads and highways. https://wisconsindot.gov/pages/about-wisdot/newsroom/statistics/final.aspx