There is the important part. Ever seen a non reversed trend in the climate history of earth? What went up came down again every single time, regardless of how big the meteorite hit was or how strong the volcanic eruptions were,Based on recent trends, it would appear the frequency will increase because the ocean temperatures have gradually increased.
it appears that many were aware of the dangers that faced NO. Previous storms have shown the vulnerability of that. But if you cut funds for maintenance on fortification of the infrastucture as I hear on CNN, then you should be surprised to meet disaster whenever the natural fertilizer collides with the supporter, be it in 500 years or yesterday.