On March 25, 1911, a fire at the Triangle Shirtwaist Factory on New York City‘s East Side killed 146 young, mostly immigrant women workers. The building, which was 10 stories high, was overcrowded and filled with flammable material, and many of its fire exits were locked. Some workers leaped to their deaths from the building’s rooftop. Protests after the fire led New York State to revamp laws governing working conditions, increase the number of fire inspectors, and write new fire safety codes.