Up here in North Jersey there were a couple of road closings, the one that affected me directly was Rt. 23 in Wayne in the vicinity of the Pompton River.
The Pompton River crosses Rt. 23 downstream of the ACOE project (link below) that was recently completed to alleviate flooding in Oakland.
http://www.nan.usace.army.mil/business/prjlinks/flooding/oakland/index.htmA lot of people have said that the flooding problem that the project was supposed to fix, just transferred the problem to downstream of the new $21.6 million flood gates. ACOE released a press release saying that is not the case and the new dam functioned as it was designed to and that the flooding downstream would have happened anyway.
Which way to think is hard to decide.
All I think is that when you open a dam to let more water flow that there will be a backup downstream if the area is not ready for the added flow that was given by the flood gates opening.