Answer:
Due to the fact over 25,000 FLIPIN' years, it goes through ALL of the weathers on earth, it weakens the rock form and making it seem like it can't take anymore to where it collapses.
Explanation:
My story would be on the way to the core of the earth they pass the sial, upper crust,lower crust, they smell Radium, stenches of landfill. Layers of the earth are Upper crust, lower crust, lithosphere,asthenosphere, mantle, outer core, and inner core.
One way is that the sun is heating up the world causing droughts and causing the water level to rise to cause floods
South Africa, it's a city in India
Tsunami I think, hope this helps