I was thinking early today it would be cool if they got into a flooded town somehow. Broken dam or rising flood waters maybe.
This was filmed at Lake Havasu:
Gives you an idea of the layout, but they could certainly fictionalize the area to suit the story.
Force a few events and you could even flood Las Vegas, that'd be pretty wild and extra cheesy
I met her, fifteen years ago; I was told there was nothing left; no reason, no conscience, no understanding; and not even the most rudimentary sense of life or death, of good or evil, right or wrong. I met this cow, with this blank, pale, emotionless face, and the blackest eyes... the devil's eyes. I spent eight years trying to reach her, and then another seven trying to keep her locked up because I realized that what was living behind that cow's eyes was purely and simply... evil.