Thin committing slab. Start as low as you can and do your best to stand up and then keep standing up til you get there, working up bad feet and a seam that feels harder than you want it to. Good flat landing.
Rain sucks, but broken holds suck even more. Remember, never climb on wet rock in Fontainebleau.
The sandstone becomes brittle, and pulling on it will ruin classic problems. Drying it doesn't help, because it's still wet and weak inside.
All you can do is wait for better conditions.