It's hard to say what's going on without knowing a little bit more so I have a few questions.
- When did you notice the leaves begin turning?
- How much of the plant is affected? Pictures might also be helpful in determining what's going on if you want to send some.
- Before all the rain, how often did the plant get watered?
Hopefully the answers to these questions and maybe some photos will point me in the right direction on how to help you.