The death toll among firefighters who worked in the wreckage of the 9/11 attacks continues to rise on the 17th anniversary of the disaster. At least 183 firefighters have now died due to cancers. Firefighters expect to come face to face with danger, it’s the nature of the job. But now they are also worried about a faceless danger -- contaminants in the air and on their clothing and skin after the flames are out. "Things have changed dramatically since the days I started," said Auburn Fire Chief Dave Spencer. Thirty years ago firefighters did not worry about lightweight construction or building materials that emit toxic fumes. "Many of our firefighters are showing up with signs of cancer and diagnosed with different types of diseases," Spencer told FOX40. Ongoing studies show that firefighters are 9 percent more likely to contract cancer and 14 percent more likely to die from the disease. Multiple studies of 9/11 firefighters who worked in the toxic dust and smoke from the twin towers collapse indicate the dangers of exposure.