Firefighters responded to a blaze at 673 Gordon Drive in the Fort Hill area at 6:45 a.m. Monday, said Capt. Chris Cooper of the Charleston Fire Department.There were no injuries."It was a substantial fire," he said. "It was put out quickly."The fire started in the kitchen in the area of a built-in microwave and spread to the attic, he said. The cause of the fire has not yet been determined.