In New York City, the Triangle Shirtwaist Factory fire kills 146 garment workers.

The Triangle Shirtwaist Factory fire in the Greenwich Village neighborhood of Manhattan, a borough of New York City, on Saturday, March 25, 1911, was the deadliest industrial disaster in the history of the city, and one of the deadliest in U.S. history. The fire caused the deaths of 146 garment workers—123 women and girls and 23 men—who died from the fire, smoke inhalation, falling, or jumping to their deaths. Most of the victims were recent Italian or Jewish immigrant women and girls aged 14 to 23; of the victims whose ages are known, the oldest victim was 43-year-old Providenza Panno and the youngest were 14-year-olds Kate Leone and Rosaria "Sara" Maltese.

March 25 is the 84th day of the year in the Gregorian calendar; 281 days remain until the end of the year.