Fire Extinguishing: Methods, Tools, and When to Fight vs. Flee

Fire Classes and Extinguisher Types

| Fire Class | What It Covers | Correct Extinguisher | |-----------|---------------|---------------------| | Class A | Ordinary combustibles: wood, paper, cloth, trash | Water, ABC dry chemical, foam | | Class B | Flammable liquids: gasoline, grease, oil, solvents | CO2, dry chemical, foam | | Class C | Electrical equipment (energized) | CO2, dry chemical (never water) | | Class K | Cooking oils and fats (commercial/residential kitchen) | Wet chemical (K-class) | | Class D | Combustible metals (magnesium, lithium — rare in homes) | Dry powder (specific agent) |

Home minimum: One 5 lb ABC dry chemical extinguisher per floor, plus one K-class in the kitchen. The ABC extinguisher handles almost everything except cooking oil fires and electrical fires involving water-sensitive equipment.

ABC dry chemical on kitchen fires: An ABC extinguisher can technically extinguish a grease fire, but the sudden pressure may splash hot oil and cause the fire to spread before suppression. A K-class extinguisher or a lid (to cut off oxygen) is safer for cooking oil fires.

Using an Extinguisher: PASS

The standard technique is the PASS method:

P — Pull the safety pin from the handle. A — Aim the nozzle at the base of the fire, not the flames. Attacking the flames accomplishes nothing. The base is where the fuel source is. S — Squeeze the handle to discharge the agent. S — Sweep side to side at the base of the fire while maintaining aim. Keep sweeping until the fire is out.

Stay near your exit. If the fire reignites or the extinguisher empties before the fire is out, leave immediately.

Operating range: Most portable extinguishers discharge for only 8-15 seconds. Know this before you engage. You don't have time to aim-adjust-regroup once discharge begins.

Extinguishing a Campfire

The Forest Service's "drown, stir, drown" method is the standard:

1. Drown: Pour water generously over all coals and wood. Use significantly more water than you think is needed.
2. Stir: Mix the coals and ash with a stick or shovel. Expose hidden hot areas to the water. Stir deeply — coals can smolder several inches below the surface.
3. Drown again: Pour more water. Continue until hissing stops.
4. Test: Place your hand 6 inches above the fire ring. If you feel any heat, repeat. Only when there is no warmth is the fire out.

If no water is available: Cover the fire with dirt, mixing thoroughly with the coals. Note that dirt suppresses fire by blocking oxygen but can trap heat — a fully dirt-covered fire may still have live coals for 24+ hours. Water is strongly preferred.

Never bury a fire: Covering a fire with dirt and walking away is not extinguishing it. Buried coals can reignite hours later when wind uncovers them.

Time required: Plan 10-15 minutes to properly extinguish a campfire. Starting the extinguishment process 20-30 minutes before your departure time ensures the fire is fully cold before you leave.

Kitchen and Cooking Fires

Grease fire in a pan:

1. Slide a lid onto the pan to cut off oxygen. Don't throw water — water flashes to steam instantly and ejects burning oil.
2. Turn off the heat source.
3. Leave the pan covered until completely cool — the fire can reignite if you remove the lid while it's still hot.
4. If no lid is available, a large pot (larger than the pan) works. An ABC extinguisher aimed from a distance is a last resort.
5. Never carry a burning pan to the sink or outside — you risk burning yourself and spreading the fire.

Oven fire: Close the oven door and turn off the oven. Most oven fires self-extinguish when oxygen runs low inside the closed oven. If smoke increases or fire spreads, evacuate.

Microwave fire: Keep the door closed. Unplug the microwave. If the fire continues after power is cut, use an extinguisher or evacuate.

Structure Fire: Fight or Flee Decision

Fight ONLY when all five conditions are met:

1. The fire is still small — contained to one object or area, not spread to walls, ceiling, or floor
2. You have the correct fire extinguisher (ABC or K-class as appropriate) that is charged
3. The room is not filling with smoke — you can see clearly and breathe normally
4. You have a clear escape path immediately behind you (door is open, hall is clear)
5. You've alerted everyone in the structure and someone has called 911

Evacuate immediately when any of these are present:

• Fire has spread beyond the original object
• Room or hallway is filling with smoke
• You feel heat from walls, ceiling, or floor
• An extinguisher isn't available or discharges without suppressing the fire
• Any person is in immediate danger who needs to be moved

Once out, stay out. No possession is worth returning into a structure fire. Smoke incapacitates faster than most people expect.

Wildfire Evacuation

When a wildland fire threatens a structure:

• Evacuation is almost always the correct decision. A structure cannot be defended safely by untrained civilians.
• If instructed to evacuate by emergency management, leave immediately. Don't wait to see if the fire changes direction.
• Close all windows and doors as you leave — this slows fire entry significantly.
• Don't return until authorities confirm it's safe. Fire can reburn areas multiple times.

Before fire season, preparedness reduces risk: Clear defensible space (100 feet around the structure), remove dead vegetation, roof debris, and materials stored against the building. This is prevention, not suppression — but it's more effective than any suppression attempt.