ISTANBUL  Residents in Adelaide's north, South Australia have been forced to evacuate their homes during Christmas lunch as a grassfire threatened property there. The fire started in a rail corridor and spread south amid hot, dry and windy conditions in the suburb of Smithfield, according to ABC News. The Metropolitan Fire Service commander of Northern Operations Stuart Dawes said the fire was intense, burning through more than 10 hectares (24.7 acres) in an hour fanned by strong winds. "The