The area in front of those houses is a narrow street that runs immediately parallel to NC12 at the north end of Rodanthe. Typically, with minor storms, what happens is the the ocean comes over the lower sandpiles in front of those houses, through the carports and under the houses, out that street, and drains onto NC 12. If you look at the drone pix posted by rpeamers in your 4x4 thread, this is the 7th or 8th house down that oceanfront row in Rodanthe. With all the water and sand coming over onto NC12 just north of these houses, it looks like the water and sand just backed up into that street and filled it up, including back under the houses and into the carports.
That area ain't gonna be fixed 'til the sandbag and re-dune that whole length of beach, including in front of the houses. Even then, the right 'cane or nor'easter is likely to repeat this.