Sit start low with two pockets. Make some moves out to the lip where you have to make a hard lockoff. Luckily there's an emergency sidepull for the left hand to help you get your body out from underneath the roof.
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.