In reply to ad111:
Well I literally created an account here just to answer... I'm currently staying in Montereau, reasonnably close to the forest, and take as a fact that the Loing is flooding all around at a his historic maximum ever. However, the highest point was reached yesterday, so it will only go better from now on - we even had a bit of sun here sunday evening.
If I'm not mistaken, I saw pictures and videos of Grez sur Loing on national TV and it was pretty bad. I don't think the forest really suffered, though...
Even if it's in french, this article have of video of Grez (but also Nemours and Montargis)
http://video.lefigaro.fr/figaro/video/images-spectaculaires-du-loiret-sous-...