At just after 4 p.m., firefighters responded to the 3800 block of Schroeder Avenue.
Authorities are now reporting heavy fire at the scene with possible entrapment.
The White Marsh Volunteer Fire Company, Joppa-Magnolia Volunteer Fire Company and Fallston Fire Company are all headed to the scene.
There has been no update on any injuries.
Motorists should use caution in the area.