Effects of heavy rain on the Marsh

Visited the marsh today after the torrential rain. The water level must have been up by 2 feet, flooding some of the paths. The lack of birds was noticeable, especially the Reed Bunting, Sage Warblers. Also missing were Coots and Moorhens and even the Mallards. I hope that it is only temporary and that they will return. My concern is regarding their nests that could have been damaged by the rising water levels, hopefully if they have been lost they can rebuild.