the thing about Natural disasters like earthquakes for example, i believe there is roughly 7000 earthquakes a day, not all are revealed to the public or hit world news as they might be a small shake. But once one big one goes off, the world has attention on earthquakes, people in other places consider what happens if there is a earthquake here and since there is like so many a day, another is bound to go off, may not be big but that will spread global and raise panic.
But all serious, the world isn't going to end, human race will face some troubles, but we will reach a point of massive overpopulation, resources run out and like other species that happened to then, the population declines (in humans case it will decline to around
Of Course That's Just My Opinion, I Could Be Wrong