If Greenland Ice shelf melted how much do the oceans of the world rise?

24 feet

Since all large oceans of the world are connected this means that any town on an ocean will have 24 feet more depth to the water. How many large cities on the ocean will be mostly underwater?

I'll let you figure it out.

If you live in ANY large city on the ocean in the world just go down to the ocean and measure 24 feet higher and look around and imagine waves in storms on top of this and storm surges on top of this in bigger storms and what that would do to your city.