We had a ton of rain last week and within a day or two afterwards I noticed the tallest stem on my actea (formerly cimicifuga) 'Hillside Black Beauty' wilting. It's my 3rd year with the plant and the first time it has sent up a flowering stalk, so I was excited to see it flower, but now, the top half of that stalk, which had all the buds, has completed wilted over and is starting to shrivel up. The rest of the plant looks fine and there is even some new basal foliage coming up. Is this due to the rain from last week? Alternatively, is it possible that it doesn't have enough moisture to support that tall stalk and that's the cause? Perhaps it's some other issue?

If anyone with a similar experience can weigh in, it would be appreciated.