Here are some pictures.
Above is an aerial view I-20, still closed. See the diagonal line in the water across the lower left corner of the picture? That's where the water is rushing over the median wall, going from westbound side to the eastbound side of the interstate. All lanes are under several feet of water that is rushing fast - that's waves up under the sign. I'm concerned that the road bed is washed out.
This is I-20 looking west at the Chattahoochee River. Six Flags over Atlanta is on your left. As you can see, the roller coasters are under water. More pictures are here (if you can get it to come up).
I'm home, trying not to kill the kids. And let me tell you, some of them need a killin'!
(I just checked - as I wrote this, TPTB opened I-20! So I can escape the kids tomorrow!)