Six Flags Great America reopened to the public on Tuesday, July 12, having been forced to close the previous day when a storm knocked out power to the park.
Traffic was reported to have backed up on Interstate 94 on July 11 when the park failed to open for the day. Although none of the park's attractions were damaged during the storm, power supplies in the region were severely disrupted by damage caused by wind speeds of up to 72 miles per hour.
The thunderstorm on Monday morning caused damage well beyond the walls of Six Flags Great America, knocking out power to homes in the surrounding area and leaving traffic lights out of action.
A spokeswoman confirmed early on Tuesday that the park would open as normal at 10am on Tuesday, with the storm having caused no damage to its infrastructure or attractions.