Water and electric hair dryers are a dangerous combination! In the early 1980s, hair dryers falling into bathtubs or sinks filled with water caused about 18 deaths per year. Since 1991, hair dryer manufacturers have been required to include GFCIs (ground fault circuit interrupters) on dryer cords. GFCIs cut off electricity to prevent serious shock. Thanks to these devices, the number of hair dryer related deaths has dropped to an average of two per year.