Crews battled a giant fire in the sweltering heat in south Dallas Sunday morning.
According to Dallas Fire-Rescue, firefighters were dispatched to 3411 E. Kiest Boulevard for a commercial fire at the Power Brake Sales building at 10:45 a.m.
When they arrived, they found the fire was mostly within the insulation of the building walls, fire officials said..
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There were five people working in the building when the fire broke out, but they all made it out safely.
Investigators said they know the fire began at the back of the business, but the exact cause was still unknown Sunday.