The latest on a major city infrastructure project that officials say was made necessary because of climate change.

Chicago has seen 6 inches of rain in June, well above the historical average of about 2.5 inches, according to data from the National Weather Service.

The newly opened McCook Reservoir kept untreated sewage out of the lake, but not out of local rivers.

Melting snow and more than 2 inches of rain have caused flooding and sewer backups in and around Chicago.

A forecast of heavy rain, unseasonably warm temperatures and melting snow presents a flooding risk for Chicago. MWRD offers tips to prevent basement backups and reduce strain on local water systems. 

Public officials gathered Monday to celebrate the completion of stage one of the McCook Reservoir, which will offer 10 billion gallons of storage capacity to prevent flooding once complete in 2029. 

There are more soggy days ahead. Find out how you can help ease the burden on the Chicago River and reduce the risk of flooding.

Chicago’s sewer and deep tunnel system couldn’t handle this weekend’s rain, allowing untreated sewage and stormwater into Lake Michigan.

After heavy storms, the Chicago River’s North Branch floods hundreds of homes on the Northwest Side. The Chicago Department of Transportation is now constructing a permanent flood-fighting weapon. We take a look.

A grand canyon that will become a deep lake: We get a tour of the final reservoir in the Deep Tunnel plan. 

Free barrels for collecting rainwater are being distributed to South and West Side communities prone to flash flooding.

A flood watch and high wind warning is in effect for the Chicago area as temperatures are expected to reach 50 degrees today. WGN's Chief Meteorologist Tom Skilling has the latest details. View the city's Pothole Tracker map.

We share what you had to say about the demolition of St. James Catholic Church and the city's new Divvy bike sharing program in tonight's viewer feedback.

Heavy rains swept through the Chicago area Wednesday morning challenging commuters and the engineers at the Metropolitan Water Reclamation District. Read an article.

View a slideshow of flood photos from Chicago Tonight viewers, producers and reporters. Submit your flood photos here and we will add them to the photo gallery.

The Des Plaines River is expected to reach record levels today. Paris Schutz has the latest.