Here is the picture. The dead wood just looks good, to me, and is really a stump. If you look very closely you can see a couple of weeds growing in the wood where it has been rotting. I want to stop that, and stop the rotting that leads to it.
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Put it out of the rain, under a roof, greenhouse etc.
Water with care, not to hit the deadwood.
The 74 year old back resists moving it very much, because it is the biggest, heaviest pot I have, and it is full of wet dirt. I think plastic for now. When the hurricane induced rain is past we will probably have a week or so with no rain (this is the usual pattern) and with full sun it will probably dry out.
Watering carefully should not be a problem. I should be able to avoid the dead wood.