Cigarette Butts and Fires: Risks, Key Figures and Prevention Solutions

Why a simple cigarette butt can start a fire

Every year in France, hundreds of fires start from a harmless gesture: throwing away a cigarette butt that is still glowing. With a temperature that can reach 700 to 900 °C at the ember, a poorly extinguished butt is a formidable source of ignition, capable of setting dry grass, forest litter or even household furniture alight within seconds.

According to the French National Federation of Fire Brigades (FNSPF), 90% of fire starts are caused by human activity. Cigarette butts are among the most frequently identified causes, alongside barbecues and agricultural work. In 2022, more than 70,000 hectares of forest and vegetation burned in mainland France, a record comparable to the black years of 1989, 1991 and 2003. Climate change makes natural environments more vulnerable with every season, making prevention more essential than ever.

This article presents the precise figures on the fire risk linked to cigarette butts, the scientific mechanisms of ignition, the French regulations in force, the penalties incurred and the practical solutions for every smoker who wants to adopt responsible behaviour, whether outdoors, in the car or at home.

Butt temperature: the scientific data on ignition

Understanding the fire risk linked to cigarette butts means analysing their thermal behaviour. The scientific data is unambiguous about the ignition potential of a cigarette, even at the end of combustion.

Combustion temperature of a cigarette

When a smoker takes a puff, the temperature at the cigarette's burning tip exceeds 800 °C, according to data published by PMI Science in its work on tobacco combustion. Between puffs, the combustion zone stays between 400 and 600 °C. Even a butt thrown on the ground keeps a temperature between 300 and 700 °C for several minutes, depending on ventilation and ambient humidity.

A study published in 2024 in the journal Fire (MDPI, vol. 7, no. 3) analysed the ignition potential of cigarette butts on pine needles (Pinus massoniana). The results show that the probability of ignition reaches 85% when the needles have a moisture content below 10%, which matches typical summer conditions in the south of France.

Factors influencing ignition

Three main parameters determine a butt's ability to start a fire:

• Ventilation: even a light wind (10 to 15 km/h) increases the oxygen supply and speeds up the butt's residual combustion. That is why closed outdoor ashtrays, or ones protected from the wind, offer far greater safety than open models.
• Fuel moisture content: grass, dead leaves and forest litter become extremely flammable below a 15% moisture threshold, which is frequently reached as early as June in the Mediterranean zone.
• Type of substrate: pine needles, dry grasses and peat are among the most vulnerable materials. A butt falling on short, dry grass can start a fire in less than 3 minutes in heatwave conditions.

Temperature comparison table

Item	Temperature (°C)	Risk duration
Cigarette actively burning (puff)	800 to 900	While being smoked
Cigarette between puffs	400 to 600	Continuous
Discarded butt (with wind)	300 to 700	5 to 15 minutes
Discarded butt (no wind)	200 to 400	3 to 8 minutes
Ignition threshold of dry grass	230 to 300	N/A
Ignition threshold of paper	230 to 250	N/A

This table clearly shows that a butt, even while cooling, is well above the ignition threshold of common combustible materials. This is why an ashtray with lid or a windproof ashtray is essential safety equipment, not just a comfort accessory.

The figures on fires caused by cigarette butts in France

Official statistics let us gauge the scale of the phenomenon in France, both in natural settings and in homes.

Forest and vegetation fires

The Prométhée database, which records fires in the Mediterranean zone, and the BDIFF database (French forest fire database) provide the following figures:

• On average, 12,000 forest and vegetation fire starts are recorded every year in mainland France.
• Between 3 and 5% of these starts are directly attributed to cigarette butts, that is 360 to 600 fires a year.
• In the Département of Gard alone, more than 300 forest fires were caused by butts over a 10-year period, according to France Bleu.
• In 2022, a record year, more than 70,000 hectares burned in France, nearly half of them in Gironde and Les Landes.
• In 2023, 2,671 fires were recorded, covering 5,292 hectares.
• In 2024, 12,300 hectares burned in mainland France, according to Reporterre.

Household fires

Butts do not threaten natural areas alone. In the home, poorly extinguished cigarettes are one of the identified causes of residential fires:

• More than 250,000 household fires occur every year in France, one every two minutes.
• These fires cause around 460 deaths and 10,000 injuries a year, according to fire brigade data.
• Cigarettes are among the top five causes of household fires, alongside faulty electrical installations, cooking appliances, candles and fireplaces.
• Typical scenarios include a butt dropped into a flower pot on a balcony, a cigarette forgotten on a sofa or mattress, and an ashtray knocked over onto a combustible surface.

To limit these risks at home, using a closed ashtray isolates the ember and avoids any contact with flammable materials. On a balcony or terrace, a terrace ashtray made of metal or stainless steel withstands high temperatures and prevents accidental spread.

Fires linked to butts thrown from cars

An Ipsos study carried out in partnership with Vinci Autoroutes in 2024 reveals that 24% of French people admit to throwing their butts out of their vehicle window. In Île-de-France, the figure reaches 42%. This gesture regularly causes fires on the verges of motorways and minor roads, particularly from June to September.

Using a car ashtray is the simplest way to eliminate this risk. Current models fit in the cup holder and include a sealed lid that puts the ember out immediately.

The scientific impact of self-extinguishing cigarettes

Faced with the problem of cigarette-caused fires, several countries have adopted standards requiring the manufacture of so-called "self-extinguishing" or "reduced ignition propensity" (RIP) cigarettes. These cigarettes have low-porosity paper bands that make the cigarette go out automatically if it is not being actively smoked.

Results of scientific studies

A study published in Injury Prevention (Alpert et al., 2014, PMC4025697) measured the effectiveness of this standard in the State of Massachusetts. The results show a significant drop in residential fires caused by cigarettes after the introduction of the RIP regulation.

At the US national level, a study published in Injury Epidemiology (Yeh et al., 2016, PubMed 27747679) established an association between self-extinguishing cigarette legislation and a 19% reduction in residential fire mortality.

The World Health Organization (WHO) published a technical report in 2015 (WHO/NMH/PND/15.1) recommending widespread adoption of the RIP standard. According to this report, compliant cigarettes reduce the risk of ignition by 11 to 45% depending on the test conditions and the environments studied.

Limits of the technological solution

Self-extinguishing cigarettes do not remove the risk entirely. They reduce the likelihood that an unattended cigarette will start a fire, but a butt that was actively smoked and then thrown away keeps its high temperature and is still perfectly capable of igniting a dry substrate. The technological solution therefore does not replace responsible behaviour by the smoker, and the systematic use of a suitable ashtray remains essential.

French regulations: bans, obligations and penalties

France has considerably strengthened its legislative framework in recent years to fight fires linked to cigarette butts. Here are the main provisions in force in 2026.

Ban on smoking in forests

The law of 10 July 2023 on the prevention of and fight against forest fires introduced a ban on smoking in all woods and forests across the country, and within a 200-metre perimeter around them, during at-risk periods defined by prefectural order. This law, passed unanimously by the National Assembly on 17 May 2023, significantly extends restrictions that previously applied only to the Mediterranean zone.

Penalties in force

Offence	Penalty	Legal basis
Throwing a butt on the public highway	€135 fixed fine	Environmental Code
Smoking in a forest during a ban period	€135 fixed fine	Law of 10 July 2023
Accidental forest fire	Up to 2 years in prison and a €30,000 fine	Criminal Code, art. 322-5
Fire causing injuries	Up to 5 years in prison and a €75,000 fine	Criminal Code
Fire causing death	Up to 10 years in prison and a €150,000 fine	Criminal Code

Civil liability

Beyond criminal penalties, the person who causes a fire with a butt incurs civil liability for the material and bodily damage suffered by third parties. In 2024, a trial in the Var led to the conviction of a motorist whose butt had started a forest fire causing more than €63 million in damage, according to Le Monde du Tabac. This case illustrates the potentially devastating financial consequences of a gesture wrongly considered harmless.

Obligations for professionals

Establishments open to the public (ERP) and companies are required to set up compliant smoking areas and install suitable equipment in them. Wall-mounted or floor-standing professional ashtrays must meet fire safety standards and be positioned away from combustible materials. This obligation applies to restaurants, hotels, offices, shops and all places open to the public.

Prevention: the actions and equipment that save lives

Preventing fires linked to cigarette butts relies on a combination of responsible behaviour and equipment suited to each situation.

The fundamental rules

• Never throw a butt on the ground, whether in town, in the countryside, at the roadside or in a forest. The reflex of carrying a portable ashtray eliminates this risk.
• Put the ember out completely before putting the butt down. Pressing the cigarette firmly into an ashtray or dipping it in a little water guarantees it is fully out.
• Never smoke in a forest during prefectural ban periods, generally from June to September depending on the département.
• Never throw a butt out of a vehicle window. A butt carried by the wind can travel several metres and reach an area of dry vegetation.
• Empty your ashtray into a non-combustible bin and never into a plastic bag or a wicker basket.

Choosing the right ashtray for the context

Choosing an ashtray is not just a question of looks. When it comes to fire prevention, the type of ashtray used makes a measurable difference.

• Outdoors (terrace, garden, balcony): favour a metal or stainless steel outdoor ashtray, resistant to heat and weather. Models with a lid or automatic closing stop the wind from scattering embers.
• On the move: a pocket ashtray lets you store your butts safely until you find a suitable bin. Compact and watertight, it slips into a pocket or bag and removes any risk of dropping butts on the ground.
• In the car: a car ashtray with an airtight lid puts the ember out quickly and contains the ash with no smell or risk of spilling.
• At a company or public place: a wall-mounted ashtray or floor-standing ashtray positioned in the dedicated smoking area ensures safe collection of butts in line with the regulations.

Cigarette butts, a risk made worse by climate change

Climate change is profoundly altering the fire risk profile in France. Data from the French Forest Observatory (IGN) shows that conditions favourable to fires now extend well beyond the traditional Mediterranean zone.

Geographical spread of the risk

According to the Ministry for the Ecological Transition, summer drought episodes now affect regions that were historically spared, such as Brittany, Pays de la Loire and Centre-Val de Loire. In 2022, major fires hit Gironde, a département that had not seen fires of this scale for decades. This geographical spread means that a butt thrown in Normandy or Île-de-France now presents a non-negligible fire risk during heatwaves.

A longer at-risk season

The IPCC report and Meteo France projections indicate that the fire season will lengthen by 2 to 6 weeks by 2050 for the south of France. For northern regions, the vigilance period could extend from May to October, compared with July and August historically. This trend reinforces the need for permanent prevention practices, not just during the summer holidays.

Impact on urban and peri-urban areas

The interface between built-up areas and natural spaces (peri-urban zones) concentrates a particular risk. Balconies, terraces and gardens on the edge of wooded areas are points of vulnerability. A poorly extinguished butt on an apartment balcony can, in strong wind, reach the surrounding vegetation and start a brush fire that spreads rapidly.

Real cases of fires caused by cigarette butts

News stories linked to cigarette butts illustrate the real seriousness of this phenomenon, which smokers often underestimate.

The Var fire (2024): €63 million in damage

A butt thrown from a vehicle window on a minor road in the Var started a forest fire that ravaged several hundred hectares of pine forest. The trial, described by the media as exemplary, resulted in a criminal conviction and a civil compensation obligation estimated at €63 million. This amount covers damage to property, the cost of the emergency response, ecological loss and the harm suffered by evacuated residents.

The Cognac fire (2022): a poorly extinguished butt at home

According to France Bleu, a fire destroyed a house in Cognac (Charente) in 2022, with investigators identifying a poorly extinguished cigarette butt as the probable cause. The occupant, a regular smoker, was using an unsuitable ashtray placed on a wooden piece of furniture. This type of household accident is particularly common and often avoidable by using an appropriate ashtray.

Motorway fires: a recurring phenomenon

Every summer, motorway companies report dozens of fires on the verges, caused by butts thrown from vehicle windows. The most affected areas are the A7 (Rhône valley), A9 (Languedoc), A8 (Côte d'Azur) and A63 (Landes) motorways. These fires tie up firefighters, cause road closures and can spread to adjacent forests. Fitting every vehicle with a suitable car ashtray would drastically reduce these incidents.

FAQ: cigarette butts and fire risk

Can a butt really start a forest fire?

Yes. A butt keeps a temperature of 300 to 700 °C for several minutes after being thrown away. This temperature is well above the ignition threshold of dry grass (around 230 °C) and pine needles. According to studies, the probability of ignition reaches 85% on a dry substrate with a light wind.

How long does a butt stay dangerous after being thrown away?

A butt thrown on the ground can stay glowing for 5 to 15 minutes, depending on wind and humidity conditions. That is long enough to ignite dry grass, dead leaves or any other light combustible material. This is why it is essential to press the ember out firmly in a suitable ashtray.

What fine do you risk for throwing a butt?

Throwing a butt on the public highway carries a fixed fine of €135. In the case of an accidental fire, penalties can reach 2 years in prison and a €30,000 fine. If the fire causes injuries or deaths, sentences rise to up to 10 years in prison and a €150,000 fine.

Are you allowed to smoke in a forest in France?

No, not during at-risk periods defined by prefectural order. The law of 10 July 2023 prohibits smoking in all woods and forests across the country, and within a 200-metre radius, during these periods. Outside these periods, smoking in a forest remains legal but strongly discouraged. A pocket ashtray lets you smoke without dropping your butt on the ground when the regulations allow it.

Which type of ashtray offers the best protection against fires?

Closed ashtrays (with a lid or push-button) offer the best safety because they completely cut the ember off from oxygen, speeding up its extinction. Metal or stainless steel models withstand high temperatures with no risk of deforming or melting. For outdoors, windproof ashtrays with a protective grille stop embers being scattered by the wind.

Do cigarette butts also pollute water?

Yes, considerably. A single butt can pollute up to 500 litres of water. The cellulose acetate filter contains more than 4,000 chemical substances, including cadmium, arsenic and mercury. Every year, 30 to 40 billion butts are thrown on the ground in France, 40% of which end up in nature. To find out more, read our article on the decomposition time of a cigarette butt.

Are there cigarettes that do not cause fires?

Reduced ignition propensity (RIP) cigarettes, mandatory in several countries, are designed to go out automatically if they are not being actively smoked. Studies (Alpert et al., 2014) show that they reduce the risk of residential fires by 11 to 45%. However, they do not eliminate the danger completely: a butt that was actively smoked and then thrown away is still capable of igniting a dry substrate.

How do you put out a butt properly?

The safest method is to press the ember out firmly in a metal ashtray, then close the lid. If you have no ashtray, dipping the butt in a little water for at least 30 seconds guarantees it is fully out. Never put out a butt by throwing it on the ground and stamping on it: this method does not guarantee the ember is completely out, as glowing fragments can remain in the grass or in gaps in the ground.

Conclusion

Fires caused by cigarette butts are a major public safety and environmental problem in France. With hundreds of fire starts each year, criminal penalties of up to 10 years in prison and civil damages running into millions of euros, the simple act of throwing away a butt can have dramatic and irreversible consequences.

Prevention means equipment suited to each situation: an outdoor ashtray for the terrace, a pocket ashtray for travelling, a car ashtray for journeys. Every smoker today has practical, durable and elegant solutions to adopt responsible behaviour, protect the environment and avoid heavy penalties. Discover our full range of ashtrays to find the model that suits your daily use.