Been there, done that with water -- both floors of our home (all 2700 sq feet of it) were open to the elements when superstorm Sandy rolled through and dumped rain. I did what I could to drain it. Probably even posted here on TBN for suggestions. We had Advantech, which helps a lot.
The second floor wasn't an issue -- it didn't yet have wall framing, so that drained pretty well. But the first floor collected water between all the wall sill plates. I cut holes across the exterior door opening sills so water could be pushed out, and drilled drain holes in the floor in a few spots. Went up there a couple times during the storm to broom standing water out. Have no idea if it really mattered, but I like to think it helped a little. If I could have put a waterproof forcefield over the entire home while Sandy rolled through, that would have saved me a lot of worrying, that's for sure.
The only part that really bothered me was that the framers made zero preparations for the storm. Simple things like picking up scraps/trash, stacking cut studs off the floor, sweeping up nails and sawdust, etc, would have made a huge difference in helping water drain. They didn't even bother to shelter tools or boxes of nails/etc (which was their problem later, if it was a problem). You could tell they called it quits the day before, and then didn't bother to come back to clean up or prep when it became apparent this was going to be more than a normal rain event. They did a good job framing, but it was clearly an 8-4:30 paycheck gig for these guys, and not a business or career. They only cared enough to get the job done. That is very typical in the homebuilding trade. My dad used to be a builder many years ago, and it was hard to find subs and workers that cared. When you did find one, you treated them well.
