Hey 2Many,
I agree, there are good reasons why he would be needed / wanted at your house during this force of mother nature. And because he is sober, your boundaries are not being crossed.
However, I have to emphasize how easy it will be to fall back into the "way things were". He is holding on to the hope that you'll take him back, and perhaps he is thinking that he's got you now... the Alcoholic brain will forever be trying to control - the way it controls him.
Also, YOU are probably vulnerable right now. Your heart is willing to accept the "picture" of perfection... but that is all it might be for the time being. Sometimes we choose the things that feel good for the moment and look great on the surface. But the truth is, that it has only been a month. HIS and YOUR recoveries may take many more months, before they are ready to take on the relationship again.
You're in my thoughts
Meg