DETROIT Dana Afana Detroit Free Press July 6, 2026, 1:06 p.m. ET Power has been restored to Marathon's Detroit refinery after the company dealt with an outage that led to a flaring event, which alerted officials to monitor air quality nearby. Due to the outage on Sunday, July 5, operating conditions made flaring necessary, according to Marathon. Flares are devices that allow excess gases to be burned off safely and in a controlled manner, though visible smoke raised concerns among residents.