We're much better than we used to be at predicting the effects of climate change, but nature is still full of surprises.
Scientists went to study a river in Canada, only to find that it wasn't really there any more. The glacier that fed the river is melting because of climate change. This caused a new channel to form and shifted the whole river and lake system in the area.
The process occurs naturally - normally it takes hundreds of years, but in this case it happened in just a few months.