The Triangle Shirtwaist Fire The Triangle Shirtwaist Fire happened in 1911 in New York City. The fire started on the top floors of the building by accident. The fire trapped many young women inside of the building. At least 50 of the workers ended up jumping to their death. About 100 workers died inside of the factory. This fire brought to light the horrible working conditions and safety issues the young women working in the factory had to deal with. The fire led to the establishment of many factory reforms, including the increase of safety precautions for the workers.