Climbing rose

I have a climbing rose at the back to the garden. As the years have passed the trees around it have become bushier and so the area is more shaded. About a week ago this rose was flourishing spreading everywhere. Today, I had a look and nearly all the roses have shrivelled up. I suppose this is due to the really hot weather and lack of rain we have had. Do you agree? Do you think that if I water it really well tomorrow, it might pick up and sort itself out - or has it just died overnight?

 

Sorry, don't know what rose it is other than it is a rambler (pale pink). I have been watering it a bit more than usual, but as we are on a water meter I can't leave the hosepipe running just on one plant for ages. I will water a reasonable amount, dead head and hope for the best.