Posted: 02/07/2017 at 08:41
I would deadhead any badly damaged and you should get another flush soon. I did read a tip somewhere suggesting that you just peel away the outer petals of any that hadn't opened properly and then they may open normally and you can just deadhead the ones that don't respond - on just opening buds the rain can almost 'glue' the petals together so they can't open so this helps overcome that. Haven't tried it myself as we haven't had any roses at that stage suffering from the rain (yet).
We visited David Ausitin roses last year just after a couple of days of heavy rain. Was so glad we had decided to go as we completely changed our minds as to which we would buy and/or keep on our wish list.
We nearly didn't go as the weather had been so awful but then decided we would and in fact we were lucky in the timing as it was fascinating and very useful to see how different ones had coped with the previous few days heavy rain. Also the obvious advantage of seeing the colours for real as they can look so different in photos and doing a nose test on the scents . I also found it useful to see how different ones aged, you often only see pictures of them in bud and at their peak and some roses do 'age' much more prettily than others.
We came home with Tess of the D'Urbervilles as the one in their garden was smothered in wide opened flowers and didn't look as if it had even noticed the rain.