What increased the number of deaths during the triangle workers shirtwaist fire?

The number of deaths during the Triangle Shirtwaist Factory fire was significantly increased by several factors, including locked exit doors that prevented workers from escaping, inadequate fire safety measures, and the building's lack of proper fire escapes. Additionally, the rapid spread of the fire due to highly flammable materials and cramped working conditions trapped many workers inside. The tragedy underscored the need for improved labor safety regulations and led to significant reforms in workplace safety standards.