If there is no pressure to move water how does a puddle eventually disappear after a rainstorm ends

The rain puddle will eventually either evaporate into the air or get absorbed into the ground.

Explanation from the Lesson:

Think about a puddle after a heavy rain. That water is not going anywhere because once the rain has stopped, there is no action. The puddle will not stay there forever; eventually, it will evaporate or sink into the ground.

Answer: A puddle will eventually disappear after a rainstorm ends due to evaporation. This is caused by the heat of the sun, which converts the liquid water into steam (a gas) and evaporates.