PORTLAND, Maine — Students at Hall Elementary School will resume classes on Tuesday morning, but not in their own building.

Laboratory tests on air quality and other environmental conditions at Hall will not be completed until Monday or Tuesday, according to an announcement Friday night from the School Department.

There will be no classes on Monday, Sept. 24, and on Tuesday students will attend classes at the former Cathedral School, 14 Locust St.

Hall, at 23 Orono Road, has been closed since Monday after an early morning fire in the building’s ceiling. Firefighters were able to quickly contain the blaze, but there was significant water damage to the building.

Hall serves 465 students in grades one through five.

“Cleanup from the Sept. 17 electrical fire at Hall has progressed well. However, we have not received the final results from environmental tests,” Superintendent Emmanuel Caulk said in a prepared statement. “We are erring on the side of caution in case any additional measures need to be taken. Our first priority is the safety of our students and staff.”

School officials will contact parents on Monday to explain logistics, schedule and options for transportation to Cathedral School. A public forum will be held Monday night to give parents more information; a time and place for that meeting had not been announced as of early Saturday morning.

Portland Recreation will continue to offer full-day child care at Riverton School on Monday for Hall students already enrolled in the before- and after-care program. Parents may drop children off starting at 7 a.m. and pick their children up by 5:30 p.m.