A stormwater charge would see property owners pay extra if they have lots of impermeable surfaces on site, like large parking lots. So people who contribute more to flooding would pay for the cost. @shawnmicallef wrote about the long fight that got us here https://www.thestar.com/opinion/contributors/2021/07/04/climate-change-likely-means-more-flooding-in-toronto-charging-a-new-stormwater-fee-is-not-the-only-way-to-help-stem-the-tide.html