The Milwaukee Fire Department has concluded that a fire that destroyed Lincoln Avenue School on June 30 was accidental, caused when rags soaked with cleaning chemicals spontaneously combusted inside the building, officials said Monday.
How investigators say the blaze began
Fire Chief Aaron Lipski said investigators reviewed surveillance video from inside the school and observed custodial staff placing what he described as "chemical-soaked rags" into garbage cans while cleaning. According to Lipski, the piled rags confined heat as their contents oxidized, producing a rise in temperature that ultimately led to ignition.
“We find that nobody acted with intent or purpose to cause this fire to occur,”
Lipski also said the footage captured a small wisp of smoke rising from a garbage can about 30 minutes before the first calls to the fire department. Once the rags ignited, flames involved the plastic waste receptacle and spread to items stored in the hallways, he said. The fire department classified the cause as accidental and attributed it to "human error."
District response and changes to cleaning procedures
Milwaukee Public Schools Superintendent Brenda Cassellius said district leaders watched the surveillance video and "took immediate action" to reduce the chance of a similar incident. The district has implemented several procedural changes aimed at limiting risks tied to oil-based products and the handling of contaminated rags.
- Staff required to place rags containing oils or cleaning chemicals into metal containers.
- Application of oil-based chemicals limited to days when temperatures are below 85 degrees.
- Employees must verify at the end of each shift that all fire doors, room doors and required windows are closed and secured.
Cassellius said the changes were made in coordination with the district's facilities team and framed as steps to reduce risk "…of this happening again." She also confirmed that Lincoln Avenue School will be demolished because the building is a total loss.
Damage, demolition and insurance
District officials said insurance will cover a portion of the costs related to demolition. Cassellius noted that $5 million from the district's insurance company will assist with tearing down the damaged structure.
| Date | Event |
|---|---|
| June 30 | Fire at Lincoln Avenue School begins; building later deemed a total loss |
| August (press conference) | Milwaukee Fire Department releases investigation findings; district announces procedural changes |
The loss of Lincoln Avenue School removes a neighborhood elementary facility from service and will require the district to address student placements, building reassignment and transportation, though officials have not released specific plans about where students will be relocated for the upcoming school year.
Public safety and future precautions
Fire officials stressed that spontaneous combustion of oil- or chemical-soaked rags is a known hazard. Limiting the storage of such materials in combustible containers and keeping them in metal safety receptacles can reduce risk, the department said. The district's changes reflect those precautions, including temperature-related restrictions on using certain chemicals.
As the community prepares for the school's demolition, questions remain about the timeline for removing debris, replacing the lost classroom space and the financial impact on the district beyond the insurance payout. Officials at the press conference emphasized training and updated procedures as immediate steps to prevent recurrence.
This investigation underscores how routine maintenance practices can create severe risks when combined with inadequate storage or disposal methods. For families and staff connected to Lincoln Avenue School, the coming weeks will focus on recovery, reassigning students and ensuring safety measures are enforced across district facilities.
