That is my understanding as well. Austin itself feels like a city plucked out of blue state, but I didn't want to risk being caught in the growing Texan zeal with nowhere to go.
Latitude doesn't help so much, you need altitude, or oceanfront and hope the currents dont shift and you are above the new high water mark. And when the refugees arrive your deed won't count for much, but at least you won't be a refugee.
I just moved back to the US after roughly 10 years in Hong Kong. If they pay you enough to move in and move out, don't worry about it (unless your kids are in school).
Sincerely,
A Georgia Resident