Cars degrade in TX, too, albeit in different ways that are sometimes less obvious from the outside. Unless you keep your car in the garage, over time the sun's UV rays absolutely destroy the interior, paint (we call peeling clearcoat and faded basecoat "Texas sunburn") and exterior plastics like headlights.
This UV ray degradation can be absolutely brutal even on cars as young as 6 years old, when they're parked outside. I've sat in seats with fabric and foam turned to dust. Dashboards cracked, steering wheels oozing sticky fluid. The degrading interior plastics give off a nasty odor that's hard to get rid of and I can't imagine it's particularly healthy to breathe. That said, some manufacturers fare much better than others, just like with rust in the north. But none are immune.