Homer "James" Rivera spent seven years waiting for a kidney, but the hospital called him Wednesday to cancel his Nov. 20 transplant because of a possible hospital workers' strike. "I was just devastated that a week to transplant, they tell me they're going to cancel," Rivera, 37, of San Diego, told ABCNews.com. "I was infuriated. I was calling and emailing anybody I could. There's got to be a way to get around this." The University of California San Diego Medical Center in Hillcrest said it had to cancel the transplant because of an impending union strike. The one-day strike is the result of a disagreement over "reckless and unsafe staffing," according to a statement the health care workers' union AFSCME gave to ABC affiliate KGTV in San Diego.