Model S (70 RWD Coil Spring Suspension) flooded in my garage on August 27 in Houston. I thought I’d share details about my experience thus far that may be of interest to the community.
The car ultimately sat in about 22 inches of water (measured from ground), probably 21 near the front and 23 near the back due to incline of garage.
The car became incapacitated when the water level was barely at the front door sills (roughly 6 or 7 inches of water from ground). While trying to move the car I got a warning message about the 12v battery and the car would not shift from Park. At this point I could still open and close the doors as normal.