Well, Mark Zuckerberg maybe thinks it's too late. This (billionaires building underground bunker complexes) is one of those areas I just can't help myself sounding a little conspiratorial! I also can't help but suspect he's building another more secret one in New Zealand, which is where these billionaires were told would be the best place to hide out climate change related collapse:
Inside Mark Zuckerberg’s Top-Secret Hawaii Compound
Meta CEO Mark Zuckerberg is building a sprawling, $100 million compound in Hawaii—complete with plans for a huge underground bunker. A WIRED investigation reveals the true scale of the project—and its impact on the local community.
www.wired.com