Tilting of Earth's crust governed the flow of ancient megafloodshttps://phys.org/news/2022-02-tilting-earth-crust-ancient-megafloods.html
As ice sheets began melting at the end of the last ice age, a series of cataclysmic floods called the Missoula megafloods scoured the landscape of eastern Washington, carving long, deep channels and towering cliffs through an area now known as the Channeled Scablands. They were among the largest known floods in Earth's history, and geologists struggling to reconstruct them have now identified a crucial factor governing their flows.
In a study published February 14 in Proceedings of the National Academy of Sciences, researchers showed how the changing weight of the ice sheets would have caused the entire landscape to tilt, changing the course of the megafloods.
Upthrust of Earth's surface is also documented around the Great Lakes of US/Canada.
With the lack of ice sheet, which weighed down the land, the area around the Great Lakes is rising, so eventually, it is expected the lakes to rise and in some cases, the water will stop flowing to the lake region. There would still be precipitation. At the same time, the erosion of Niagara Falls will reach lake Erie at some point, and Lake Erie and the others will drain very quickly.