By Maya Morales  Signal Staff Writer   L.A. County firefighters were dispatched to the southbound Interstate 5 freeway near Templin Highway for a brush fire that broke out and caused a closure of three southbound I-5 lanes on Tuesday night, according to Kaitlyn Aldana, spokeswoman for the Fire Department.  Firefighters were dispatched to the area at 7:42 p.m. and arrived on the scene at 7:53 p.m. Aldana said Wednesday morning.   According to Aldana, the blaze grew to 6.2 acres with no structures threatened.  Fire Capt. Shelia Kelliher said Tuesday night there was a hard closure of the southbound 5 freeway requested by the incident commander because heavy smoke was blowing across the lanes.   Lanes 1, 2, and 3 of the southbound I-5 were closed during the duration of the incident, but Lane 4 remained open.   The incident was closed at 11:53 p.m. on Tuesday with no injuries reported, said Aldana.  California Highway Patrol officers opened all lanes of the southbound I-5 at 11:58 p.m., according to Officer Michael Nasir.   The post Templin Highway brush fire extinguished   appeared first on Santa Clarita Valley Signal.