When a whale is beached, it is unable to return to the water on its own. This is because whales are very large creatures and their weight prevents them from being able to turn themselves over. Additionally, their fins are not designed for movement on land. As a result, they become quickly exhausted and die from dehydration and overheating.
There are several reasons why a whale may end up beached. One possibility is that the whale has become ill or injured and is no longer able to swim properly. Another possibility is that the whale has become separated from its pod and does not know how to find its way back to them. Finally, some whales simply beach themselves deliberately, although it is not clear why they would do this.
If you see a beached whale, it is important not to touch it or try to move it yourself as this could further injure the creature. Instead, you should contact a local marine rescue organization who will have the equipment and expertise necessary to safely return the whale to the water.