Hi. I'm jumping in late to this because, ironically, I've been in the hospital with an infection and fluid buildup (like 20 lbs of it). I commented to one dr that I must have been impregnated with an alien baby it happened so fast.
I'm sorry your dad is having problems. One thing I've learned this week (and it may or may not help you, but I throw it out there anyway) is that in my case, the fluid buildup, which is primarily in my abdomen at this point is much more likely the result of freaking my kidneys out when I got very dehydrated because my biliary drain tubes/bags were pulling so much fluid out of my system than related directly to the cc. So, the lesson I learned is that my oncologist pulled in a multi-disciplinary team - infectious disease specialist and nephrologist. They are telling me my fluid will go away, but slowly. It is not ascites.
Wondering if your dad's drs are using a multi-disciplinary approach?
I also wanted to comment on the cold weather issue. While it's true that he's not going to be sitting in a lawn chair in the snow, it is also true that cold weather affects each of us differently (and even differently than it might otherwise have pre-cc). I get cold so much faster - even in my house (which is nearly 100 years old and drafty in places) and I take a really long time to warm up. With my biliary drain tubes, I can't rely on my favorite hot soaking bath to warm up either. So, even if he's not outside a lot, the cold can definitely play a big role in how he's feeling. My husband gets upset with me when I say it's too cold for me to walk with him and the dog lots of nights, but it's the truth.