7 Fire Risks Your Night Cleaning Crew Spots First

Fire Prevention Week runs October 4 to 10, 2026. The National Fire Protection Association (NFPA) has sponsored it since 1922, timed to the anniversary of the Great Chicago Fire, which began on October 8, 1871. This year's theme is "Charge into Fire Safety: Safe Charging Is a Superpower," with a focus on lithium-ion batteries. That message applies to office buildings as much as homes.

Most fire hazards in a commercial building are not dramatic. They are a box in the wrong place, a power strip plugged into another power strip, or a trash room that missed a pickup. Tenants walk past them every day without a second look. Your cleaning crew is often the only team that walks every floor, every suite and every back corridor each night, when the building is quiet enough to notice.

Here are seven commercial building fire hazards that janitorial crews in Northern Virginia buildings tend to see first, and what property and facility managers can do about each one.

1. Blocked exits and propped fire doors

Exit routes collect clutter: furniture waiting for pickup, boxes left from a suite move, a delivery parked in a stair landing. OSHA is clear that "exit routes must be free and unobstructed" and that no materials or equipment may be placed in them, "either permanently or temporarily." Fire doors wedged open are a related problem, because an open stairwell door lets smoke move between floors.

What to do: Make exit corridors and stair landings a nightly check item. Ask your crew to photograph anything blocking them so the right tenant can be contacted the next morning, and hold your own vendors to the same rule, cleaning carts included.

2. Storage in electrical rooms

Electrical and telecom rooms are the closets nobody wants to give up. Over time they fill with spare ceiling tiles, paper, and holiday decorations. The National Electrical Code requires clear working space in front of electrical equipment, at least 30 inches wide, and that space cannot be used for storage. Combustibles stacked near a panel add fuel and slow down anyone responding to a problem.

What to do: Keep electrical rooms locked where possible and make "nothing stored in front of panels" a standing inspection line. When something shows up, a dated photo makes the conversation with a tenant or vendor short and simple.

3. Overflowing trash and recycling

Trash is fuel. Overflowing bins, cardboard stacked on a loading dock, and full dumpsters pushed against a building wall all raise the stakes. The U.S. Fire Administration reports that intentionally set fires in nonresidential buildings rose 116% from 2014 to 2023. Loose, accessible trash is one of the easiest things to take out of that picture.

What to do: Match pickup frequency to how each property actually generates waste, especially around tenant move-ins and move-outs. Ask the crew to log when containers are full before the scheduled pickup, so you have the data to adjust the hauler contract.

4. Lint and dust on equipment

Dust collects on anything that runs warm: refrigerator and vending machine coils, the backs of copiers, server closets, and electric heaters. In medical offices and fitness areas with on-site laundry, dryer lint traps belong on the list too. A layer of dust on warm equipment is fuel sitting right next to a heat source.

What to do: Add high dusting and behind-equipment dusting to your periodic task list. Just as important, the crew should report equipment that is unusually hot, buzzing or smells like burning rather than cleaning around it, so building engineering can take a look.

5. Daisy-chained power strips and space heaters

As the weather turns colder in Arlington, Fairfax and Loudoun, space heaters start showing up under desks. OSHA guidance says power strips "are not to be series-connected" to other power strips or to extension cords, and that they "are not designed for high power loads such as space heaters, refrigerators and microwave ovens." A crew emptying a wastebasket under a desk sees these setups long before anyone else does.

What to do: Have the crew flag chained power strips and heaters plugged into them. Pair that with a seasonal tenant reminder every October.

6. Lithium-ion batteries charging overnight

This is the focus of this year's Fire Prevention Week. E-bikes and scooters get charged in suites and storage rooms, and laptop or tool batteries are left charging on carpet or upholstered chairs. NFPA recommends using manufacturer-approved charging equipment, charging on hard, flat surfaces, and no longer using batteries that become excessively hot, swell, emit smoke or produce unusual odors.

What to do: Set a clear building policy on where micromobility devices may be stored and charged. Ask your crew to report swollen batteries and devices charging in corridors, stairwells or on soft surfaces.

7. Grease and crumbs in break rooms

The U.S. Fire Administration lists cooking as the leading cause of nonresidential building fires, with an estimated 33,300 cooking fires in 2023. In an office, that risk lives in tenant pantries: toaster crumb trays, splattered microwaves, and greasy range hoods.

What to do: Make sure your pantry scope includes appliance interiors and crumb trays, not only counters and sinks. Ask the crew to flag appliances with frayed or damaged cords.

Turn what the crew sees into a record

Spotting a hazard only helps if someone acts on it. That is why OCC Clean builds reporting into its Quality Assurance Program at no extra cost. Crews log issues through digital inspections with photo reporting, so a property manager sees the blocked exit with a date and location instead of hearing about it weeks later. Tenants can report problems by scanning a QR code, and monthly supervisor reviews look for patterns, such as the same storage room filling up month after month. Because janitorial, day porter and on-site building engineering sit under one contract, a flagged item does not have to wait on a second vendor.

NOTE: A cleaning crew is not a substitute for your fire marshal inspections, your fire protection contractor or your building's fire safety plan. It is an extra set of eyes on every floor, every night, and it is worth putting those eyes to work.