Apartment Building, Residential McKinney, TX – Fire sprinklers keep fire from spreading at second floor apartment May 22, 2020 viking210 The McKinney Fire Department (MFD) responded to a reported water flow alarm at the Magnolia Ranch apartments located at 3191 Medical Center Dr., at 1 p.m. on May 17. Units arrived to find smoke alarms going off and water running off the balcony of one of the second floor apartments. Fire sprinklers kept the flames from spreading and firefighters were able to shut the fire sprinkler system down.