Not knowing the answer, I called the Office of Elections in Hawaii. Kevin Cronin, chief election officer for the state, just got back to me. Here’s what he said:
Ms. Dunham’s absentee mail ballot was received and reviewed under the Hawaii standards for processing absentee mail ballots… She was alive at that time. Her ballot will be opened tomorrow, and it will be counted in the same way that all absentee voters would be treated under our law.
The key point appears to be that Ms. Dunham was alive at the time her absentee ballot was received and reviewed, and that it met the standards for review at that time.
Madelyn Dunham’s vote will count, even if she is not here to learn the final tally.