What to do if a pan catches fire
Cooking fires are the leading cause of home fires and injuries. Knowing three things — turn off, smother, never use water — can stop a pan fire from becoming a house fire.
If there is a pan fire right now
- 1Step back. Do not lean over the pan. Move away from the heat source.
- 2Turn off the heat only if you can do so safely without reaching over the flames.
- 3Slide a lid or fire blanket over the pan. Never drop it from above. Never use water.
- 4Leave the pan covered for at least 15 minutes. Do not lift the lid to check.
- 5If the fire spreads — leave, close the door, call 999 (UK) · 911 (US) · 112 (EU).
Why water makes it worse
Burning cooking oil reaches temperatures of 300–400°C (570–750°F). Water boils at 100°C. When water hits the oil it vaporises in a fraction of a second, expanding to roughly 1,700 times its liquid volume. The resulting steam explosion throws burning oil outward and upward — a boilover — capable of covering a person in flames and reaching the ceiling. The NFPA cooking safety guidance and the USFA cooking fire statistics both highlight this as a common and preventable cause of serious burns.
What smothering does
A pan fire needs oxygen to keep burning. Sliding a lid or fire blanket over the pan cuts the oxygen supply without disturbing the burning oil. The fire consumes the remaining oxygen in the space under the cover and goes out. This is the principle of starving the fire of oxygen — one of the four sides of the fire tetrahedron. A Class K extinguisher (US) or wet-chemical extinguisher (EN/UK) works on the same principle, additionally forming a cooling foam layer over the oil surface.
Prevention: the best response
Never leave cooking unattended — the majority of cooking fires start when someone leaves the kitchen.
Keep a fitted lid or fire blanket within reach of the hob. A fire blanket compliant with BS EN 1869 should be in every kitchen.
Use a thermometer when deep-frying. Keep oil below 190°C (375°F). Most fires start when oil overheats.
Install a heat alarm in the kitchen, not a smoke alarm. It will detect the fire without false alarms from normal cooking.
The rule to remember
"If in doubt, get out." The cost of a ruined dinner is nothing compared to a house fire. Closing the kitchen door on your way out slows fire spread significantly — compartmentalisation buys time for the fire service to arrive.
Primary sources: NFPA Cooking Safety · USFA Cooking Fires · UK GOV Fire Safety
Pan fire FAQ
Common questions about pan and cooking fires
Never use water on a cooking oil fire. Water turns to steam instantly on contact with burning oil, violently expanding and spraying burning oil across the room — a phenomenon known as a boilover. This can cause severe burns and spread the fire rapidly. The NFPA home cooking safety page and UK GOV fire safety guidance both explicitly warn against using water on cooking fires.
If you have no way to smother the fire safely, leave the kitchen immediately, close the door behind you, and call emergency services. Do not try to carry the pan outside — a burning pan carried through a house can drip ignited oil, spread the fire, or cause severe burns. Evacuation is always the right choice when in doubt.
Turn off the heat first if you can do so safely. Hold the blanket edges so your hands are protected, and lay it over the pan by sliding it away from you — do not drop it from above, which can push air under it and fan the flames. Leave the blanket in place for at least 15 minutes. Never lift the blanket to check — the oil will still be extremely hot. BS EN 1869 covers fire blanket performance standards.
Call immediately if: the fire has spread beyond the pan; you cannot safely reach the hob controls; the fire has not gone out after smothering; anyone is injured or at risk. In the UK call 999, in the US call 911, in the EU call 112. The USFA cooking safety page notes that cooking is the leading cause of home fires and injuries — when in doubt, get out.
Yes — deep-fat fryers and chip pans contain much larger volumes of oil at higher temperatures. The risk of a violent boilover from water is even greater. Never leave a deep fryer unattended, and use a thermometer to keep oil below 190°C (375°F). Thermostatic deep fryers are significantly safer. The UK fire safety guidance specifically highlights chip pan fires as a major cause of kitchen fires.