In the summer of 1900, a Chicago boy could spend his Fourth of July the way thousands of boys did. He’d fire a blank cartridge pistol at nothing in particular, feel a sting in his palm, wrap it in a handkerchief, and get back to celebrating. About a week later, his jaw would start to tighten. Believe it or not, this explains where our town’s fireworks show came from.

Doctors of that era had a name for it: Fourth of July tetanus. The phrase showed up in medical journals as early as 1901, because the pattern repeated every summer. Kids fired blanks at close range, the dirty paper wadding drove deep into the wound, and lockjaw followed within days. In 1900, the Cook County coroner recorded 29 tetanus deaths in the three weeks surrounding the holiday. Twenty-seven of those traced back to holiday explosives, and every one of those victims was a boy.

The numbers kept climbing. Starting in 1903, the Journal of the American Medical Association began publishing an annual count of holiday casualties, the way papers now track shark attacks. That first year, 466 people died and more than 4,400 were injured. By 1910, the running tally had passed 1,500 deaths and 33,000 injuries. One medical journal noted that July 4, 1909, produced more American casualties than the Battle of Bunker Hill.

The Deadliest Toy in America

The biggest killer of the era was a toy. Over seven years, blank cartridge pistols caused 794 deaths, more than every other cause combined, and most of the victims were boys between 6 and 18. The reason comes down to what covered American streets at the time. Horses ran everything, so city dirt carried generous amounts of manure, and manure happens to be the tetanus germ’s favorite neighborhood. A kid with grimy hands and a fresh powder burn had essentially inoculated himself with the wrong thing.

Eventually, JAMA’s editors abandoned their bedside manner. A 1910 editorial declared that any city still permitting blank cartridges was aiding “torture and murder.” Medical journals rarely talk like that. This one had spent seven years counting dead children.

The Mothers Who Fixed the Fourth

Then came 1908. That summer in Cleveland, a spark from a sparkler ignited a fireworks counter inside a Kresge store, and seven people died in the crush to escape. The Cleveland Congress of Mothers responded by organizing every women’s club in the city, and together they pushed an ordinance through city council banning fireworks. Other cities followed. Reformers called the campaign the “Safe and Sane Fourth,” and it spread from a handful of cities in 1908 to much of the country within a few years.

The formula was simple. Cities took the explosives out of children’s hands and filled the day with parades, pageants, band concerts, and professional fireworks displays fired at a distance from the crowd. The results arrived quickly. Chicago counted 601 holiday injuries in 1914. One year later, the count was 177.

That’s the origin story of the show you’ll watch this weekend. The municipal fireworks display exists because doctors, mothers, and town councils looked at a casualty report, decided the country’s birthday deserved better, and fixed it within a generation. Americans spotting a problem and engineering their way out of it, on the nation’s own birthday, might be the most patriotic detail in the whole story.

What the Old Reformers Would Tell You

Their advice still applies, because fireworks still send thousands of Americans to emergency rooms every summer. A surprising share of those injuries involve the products we treat as harmless. A standard sparkler burns at roughly 1,200 degrees Fahrenheit, hot enough to melt glass, and we routinely hand them to toddlers in flammable pajamas.

So borrow the century-old playbook this weekend. Let the professionals handle anything that leaves the ground. Keep a bucket of water within reach for everything else. Light one item at a time, step back fast, and leave duds alone, since relighting a half-burned fuse is how fingers went missing in 1905 and still is.

The Fourth earned the nickname “the Bloody Fourth” once, and a coalition of doctors and determined mothers took it back. Holding onto their work costs you a bucket of water and a few extra feet of distance. People in 1909 would have taken that deal on the spot.