The importance of the ancient Roman aqueducts cannot be emphasized enough. The final destruction of Rome occurred in 537 AD during a siege on Rome by the Goths. The aqueducts which supplied Rome with water were destroyed. The people of Rome could not survive without water and the population of Rome fell by 90% because of lack of water and disease.
This is because they relied on aqueducts so much. Imagine if someone turned off all of your water in your house and said “SURVIVE”. It would be impossible. So when an Aqueduct was destroyed it was catastrophic.