California has an interestingly different but related geographic history. High land tends to be more expensive and whiter, while low terrain tends to be less expensive and more full of minorities. However, the worst disasters (fires and mudslides) tend to hit the highest elevations worst. In this case it seems to be the views, and perhaps issues of air quality and ordinary rain drainage, that attract richer people, even though the disasters are worse. (There could also be an element of the difficulty of planning higher density development on rough terrain.)