Well, apparently these photos are all over the internet and everyone's wetting their pants that a couple of cars got damaged. The guy's got four wing cars--seven digits' worth--so clearly the money's there to repair them even if they were uninsured. This is the well-heeled man's equivalent of a parking-lot fender bender.
In terms of, "how could he let this happen?" it's clear he tried--the other two cars remain unscathed. He either ran out of time or underestimated the storm surge, neither of which is particularly condemnable. It's not unusual for people to get complacent about their cars' safety anyhow: "They're eight feet off the floor, they'll be fine" has now become "They were eight feet off the floor--and it wasn't enough." Lesson learned.
To me, and possibly to you, it's just an "oof" but there are/were those out there apparently losing their minds over this. How worry-free are their lives that this minor event would affect them so strongly?