Your parents are older. They live by themselves, and are beginning to slow down. Their hearing isn’t great, and they need help taking care of themselves.
What to do?
Well first and foremost if they still have their mental faculties you can help them greatly by scouting out their house for fall risks, and adding grab bars where appropriate, like in their bathrooms. Tripping over a throw rug can lead to a broken hip, which can lead to a rapid decline in the health of our elderly parents. Remember how we all feverishly worked so hard to house proof our homes for our first born children? It is that type of vigilance we need to adopt with our elderly parents as well.
So begin to house proof your parents homes asap. You and your parents will be glad you did!