Both Kensington Culinary Arts High School and H.A. Brown Elementary School will be open for a regular school day the according to the School District of Philadelphia.
Staff and students will report to school as regularly scheduled.
The blaze started just before 7 p.m. Monday along the 2000 block of East Boston Street. The flames were not extinguished until around 1:00 a.m. Tuesday, and firefighters remained on the scene for most of Tuesday.
The vacant building, measuring about 100 feet by 100 feet, had heavy flames upon the arrival of first responders.
Nearby homes were evacuated and a shelter was set up at the Kensington High School by the American Red Cross.
The building used to house a company warehouse, Cavco, which made vinyl replacement windows.