In reply to justthefacts:
Don't panic just yet. I was in Rodellar this week: on Monday evening there was torrential rain for several hours, but on Tuesday virtually everything was bone dry and people were climbing as usual.
If (as forecast) there is an extended period of continuous rain, many of the steeper, harder routes will probably still stay dry for quite a while, until seepage starts working through. The easier angled routes are obviously more likely to suffer from direct rainfall.
Alternatives: places like Siurana and Margalef are generally less steep than Rodellar, and there are few or no sectors where climbing in the rain is possible. However, both zones dry out far more quickly than Rodellar's tufas.
The crags in Lleida province are another possibility — it rained here this morning but I'm still off out to Camarasa for a few hours, where I hope to get some routes in between showers.
Good luck.
Pete.