CANADIAN, Texas — The explosive growth of the second-largest wildfire in Texas history slowed as winds and temperatures dipped but the massive blaze was still untamed and threatening more death and destruction.The Smokehouse Fire is the largest of several major fires burning in the rural Panhandle section of the state. It has charred 1,300 square miles (3,370 square kilometers) and crossed into Oklahoma.Firefighters have made little progress corralling it – containment was at just 3% —…