If a diabetic retain fluid in their system can they die from drowning?

My father passed away vomiting what his doctor says excess fluid in his system. Fluid came out of his nose, mouth and ears. I have seen people who drowned, people who almost drowned, and also those who were brought back after drowning. During my father's last minutes, he struggled as a drowning, and drowned victim. Just not what I thought would be my dad's way to go.