If you own a single-family home or a 2-4 multi-unit in the City of Chicago, the City wants to encourage you to disconnect your roof downspouts, so as to relieve the storm-sewer system with as much water as we’re getting.
The act of disconnecting is relatively easy, but it should be done carefully and with some fore-thought. What you want to avoid is having storm water seep into your basement, because the downspout is not putting the water flow out far enough from the building foundation. Ideally the property has enough yard space to absorb the water. How great would it be to not have to water the yard as much in the Summer, because the yard gets all the water it needs from nature itself? Pretty great.
Here is a link to City pages, which spell out this idea in more detail:
Here is a link to some history on the City’s storm sewer system:
Thank you, to Anna S Jacobson, who prompted me to write this post.