On March 25, 1911, a devastating fire broke out at the Triangle Shirtwaist Factory in New York City, killing 146 workers, most of them young immigrant women. The fire spread rapidly, and the workers were trapped due to locked exit doors and inadequate fire escapes. The tragedy sparked outrage and led to significant changes in labor laws and workplace safety regulations. The fire is remembered as one of the deadliest industrial disasters in U.S. history and as a turning point in the labor movement. It galvanized the fight for workers rights and better conditions for industrial laborers.