Well, an example is like the Ice Age.
When the climate change drastically dropped, it caused almost the whole entire planet to freeze, and surviving on Earth became extremely difficult.
When the climate change drastically increased, all the ice from the Ice Age began to melt and huge portions of land was wiped out by the melted water, which is why many of our countries today are actually smaller than they were supposed to be since the water took over and became part of today's ocean.
I hoped I helped you! ^u^