Prabhupada's lecture - Śrīmad-Bhāgavatam 1.10.5 - Mayapura, June 10, 1973
Similarly the river, the river has its function to supply water all the year. During rainy season the water is collected on the top of the hill. It is stocked there by God's arrangement, and they come down. Just like we, by power pump, we get water down to the top of the roof and stock there. Similarly, on high level of hills and mountains water is stocked. Sometimes they are stocked in ice form, not in liquid form.
So according to the seasonal changes the ice becomes melted and the water is supplied. It comes through the river. The same thing is there, but because we have now turned to become demons, the river sometimes overfloods, killing so many men and animals, at the loss. Actually everything is meant for kāmam, for supplying our necessities. And as soon as you are disobedient to God, demons, nature will give you punishment. Instead of supplying you water, water is there, it will overflood. You will be in trouble.