Though California will probably not lose a seat, the map plainly shows that the seats will need to be redistributed away from the coast and the inner city areas and out to the recently growing areas inland. This is a good illustration of the fact that just because there may be no change in the number of Congressional seats with a state, it does not mean that serious redistricting is not required in that state.
Data on all of the districts in the US and an analysis of each can be found here.
