CBS News Chicago has now obtained more than 100 internal documents and photos outlining what happened the day of the flood.

The Illinois Commerce Commission on Thursday authorized Peoples Gas to restart a multibillion-dollar program to upgrade 1,100 miles of gas pipes beneath Chicago’s streets. But regulators trimmed ...

The Illinois Commerce Commission said the expansive project can't come at an unreasonable cost to customers, who have been upset about rising gas bills in recent years.