Apparently his version of Hell's Kitchen hadn't gone through an alien invasion. Jessica decided that didn't really matter though, since they were all stuck here anyway.
"This is a camp where we're trying to survive the end of the world," she said. "Some of the people have been stuck in this world for years. Some people show up here right away. Some people have been out there for a while before finding their way here." She was aware that she still wasn't really providing him with any good answers to his questions but that was more because there weren't any good answers than because she was being deliberately obtuse.