A very sad story (you certainly made the tears flow from my eyes), particularly when such things happen to the best people.
Your Dad sounds like a great man, I hope I can be a fraction of of the type of parent to my kids as he must have been to you. Not to mention his selfless act in making others lives better at the cost of his own.
It would be easy to sacrifice ones own life but hard to leave behind others that you love. As a parent my fear isn't so much in losing my life it's more so the effect it would have on my family, my husband and my children. That is probably my worst fear in life.
Sincere condolences to you and your family.