Authorities are investigating the cause of a massive fire that raged for more than 10 hours at the St. Clair Power Plant in East China Township Thursday and Friday. The fire broke out at the DTE plant on Recor Road at about 6:30 p.m. Thursday. Fire crews extinguished the blaze at about 4:45 a.m. Friday and continue to monitor the facility for rekindling. All employees were evacuated from the building with no injuries reported. DTE teams invoked emergency procedures and shut down all generating units at the site while working with first responders to control the situation, the energy company...