Rhubarb

The leaves on my rhubarb plant have gone all dry and papery. I stopped harvesting last week and instead of putting on nice fresh growth to feed the plant for next season, the leaves have gone like brown paper. Any ideas as to what this might be?

I think all you need to do is give them a really good soaking..........it's been really dry and windy this year

Thanks! I had a feeling it might br lack of water.