According to the Washington Post, “Climate fears are driving ‘ecomigration’ around the globe” [reg req’d, full text at Climate Ark, extracts at the ODT], and the example the paper chose was NASA computer expert Adam Fier and his family, who have moved to New Zealand:
…a place they had never visited or seen before, and where they have no family or professional connections. Among the top reasons: global warming.
The Post goes on to examine the phenomenon in some detail: