Today (Monday) the waters of the river have now receded, since much of Lourdes along the river was flooded at the weekend. The clean-up has now begun. If you would like to donate to the authorities to help support this massive clean=up, please visit the official Lourdes page, here: http://fr.lourdes-france.org/evenement/operation-lourdes-solidarite-inondations-2012
In addition, if you want to see some of the clean up of the Grotto, please view the official YouTube video: