Ooh. You have 2 threads going with the exact same question, might want to see about getting these combined into one.
https://www.backyardchickens.com/threads/my-coop-floor-is-flooded-help.1504800/#post-25212851
Do you have a tarp that you could temporarily put up?
Can we see pics of your set up?
I've had it rain and with the wind blowing just right, it made the inside if the coop wet. What I did was go out right before I out them to bed and scrape off the top layer of bedding. Then put a thick fresh...