Toni,
I'm sure Dad will find lots of ways to help in Texas right now. Evacuees have pre-existing health problems as well as any new problems. And of course, alot of stress sure isn't good for anyone. It will be awhile before he and others are not needed.
My son is back at school at Ohio State. The "mission" for hurricane relief turned out to be a "volunteer" mission. He didn't volunteer. Can't say I blame him. He was willing to go for the first three weeks of September, but OSU started fall quarter after that. A year in Iraq and away from school hasn't added up to any real progress toward his degree, even though some of Uncle Sam's job training and certification does translate into college credit. Although he might wish he wasn't taking the math course he's taking this quarter!
PS - are you sure it's a cold and meds and not volcanos messing up your head?
After all, those Alaskan volcanos have been busy rumbling and you are the only person I can think of who is actually allergic.