The sun is too hot
The weather is getting hotter
Water couldn't deal with it any more
So it evaporates
It turns to gas
Then becomes part of a cloud
The cloud is getting full
What should it do?
It releases small droplets, which are rain drops
Down to the surface of the Earth
Some rain drops meet the rivers
Some meet the hills
If they meet the hills
They roll down and fall into a river
Strangely, the river water got sucked
Into the aquifer
And from there, it flows back to where it was first found
And it is waiting
Waiting for another chance
To get started a hydrologic cycle, again.