In short, no. There are a fair few plug-ins and shader networks floating around but water is one of the biggest challenges in UE4 right now. You can hunt around and if you’re handy with C++ and the Material Editor and various external tools (Houdini in my case) you can put something really nice together, but there’s not one thing that everybody flocks too.
As for reactive water, there is only one Fluid-Surface like plug-in that I know of right now and that was in the GitHub/Engine part of the forum somewhere. JamesG released the Fluid source code from UE2 and somebody adapted it into a plug-in. There is also a good hour-long tutorial around somewhere on simulating buoyancy with water, and a few good shader networks around too.