The weather is becoming increasingly extreme. Long periods of drought alternate with heavy rainfall. The city can currently handle a downpour of 20 millimeters, but peak rainfall is expected to reach as high as 170 millimeters. Many neighborhoods in Rotterdam are still 80% urbanized. Here, water isn't absorbed into the soil, and heavy rainfall overloads the sewer system. To accommodate all that rainwater at once, cities need water storage capacity. This Water Guide from Rotterdams Weerwoord shows where you can find this storage capacity.
Go to the website from Rotterdam Weather Answer.
