Hey, Miami is sinking, yes. All South Florida floats on the Oolite, the soft, spongy oolitic limestone that is old ocean bed. We know that ocean and land has alternated, in layers, many times even just in the last 10 to what, maybe 50 thousand years or so.

The guys that sell topsoil have pits that alternate between calcium deposits (ocean bottom) and black soil seven or eight times! But don't worry about the house sinking, you can drive across anyone's lawn, everybody parks on the lawn. (Miami sinking was mentioned in the intro)