Hi,
It is difficult to estimate the time when pulmonary edema can happen in your father as it depends upon the amount of fluid taken, the functioning of heart, presence or absence of right heart failure, preexisting lung pathology etc. If he is not on any medication and fluid restriction fluid build up in lungs can be very fast with in days. Hope this helps. Take care.
There is no one on Earth who can give you that answer, but it shouldn't be long.
I've been to 100% whiteout, and if I hadn't been rushed to the ER, I wouldn't be here writing this post. As human nature goes, he will fight to take a breath with everything he has, and it will be a dramatic exit. I hope you are ready to deal with it.
The Best to your father and you......
I know I'm not answering your question but may God bless you. I will be walking in your shoes very shortly. My thoughts and prayers are with you.