A couple of points

Harvey appears to be stair-stepping into landfall, and thus the very center may very well make absolute landfall north of Corpus - perhaps a good deal north of CC, but yet not north enough to prevent Corpus from actually riding out the eyewall for an extended duration - never getting a 'break' during the pass of the actual eye.

Most importantly, Harvey is anything but a point on a map. Certainly, the eyewall will be like the passing of a many-miles-wide EF3 tornado, perhaps with embedded vortices of its own adding to the eyewall's destructive potential. However, the massive swath of torrential tropical rain, widespread damaging wind, high coastal storm surge, and duration of the entire event - that is what makes Harvey orders of magnitude more dangerous than your run-of-the-mill Katrina/Rita/Charlie/Ike, etc. Not a "Run-of-the-mill Katrina/Rita/Charlie/Ike." Residents who have not yet evacuated from locations at risk should let that sink in.