Jakarta had put up immediate short term solutions, and is currently looking into a few probable solutions to work with.
At the current moment, walls have been built along the coast to prevent the water from moving inland. It is quite a scary thought for people leaving close to it, as they could at any moment be surrounded by water if the wall ever fails its function. The walls are only a temporary that will not last long. And so, plans have been put in placed for a more permanent solution.
More shall be explained in the other pages.