Dallas Firefighter’s responded to a 4-alarm fire on the 4200 block of Fairmount this afternoon. The building was an old vacant apartment building. Firefighters arrived to find heavy smoke coming from the structure. The Deputy Fire Chief added 4-alarms to this fire due to the extreme heat temperatures. The addition of the four alarms also gives Dallas Fire-Rescue more manpower to relieve the initial firefighters fighting this fire. Fire Investigators have not determined a cause. No injuries were reported during this fire.