Three Mount Vernon ladder trucks initially reported to the scene, but firefighters were forced to fight from outside due to the intense smoke and heat from the flames, fire officials said.
Mount Vernon police officers are currently diverting traffic in the area, while emergency medical workers standby on alert for any injuries.
As of noon on Wednesday, fire officials could not say what the cause of the fire was, or whether the blaze was yet under control. The structure is likely going to be lost.
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