text:  WFMD News. Montgomery County Fire and Rescue crews responded to a fire in a two-story home in Potomac early this morning. The blaze started just after 6 a.m. in the 8800 block of Cochran Court. Montgomery County Fire and Rescue spokesman Pete Perringer said when crews arrived, they found heavy fire. And he added the blaze likely started with a grill and propane fuel tanks. All of the occupants got out safely. There were no injuries reported.