I hope your dad is doing ok. You might check into one of these thingys for him....I have a friend who bought one at the street fair here and it works really great; I'm going to get one for the dogs....I bet it would make your dad more comfortable too~Amazon.com has them for around $12 each too...this link will take you to the company's site where there's other personal misting systems too....more expensive, but I'm sure well worth it!
https://www.mistymate.com/shop/compo...mart/Itemid,26