Wildfires: understanding, preventing and acting
Every year, thousands of hectares of forests, heathlands and natural areas disappear due to fires. Long considered a phenomenon unique to Mediterranean regions, wildfires now affect a large part of Europe, including areas that were once little exposed.
The increase in temperatures, prolonged drought episodes and strong winds create conditions particularly favourable to the spread of flames. However, in the majority of cases, a wildfire is not a foregone conclusion: it is often avoidable.
What is a wildfire?
A wildfire is a fire that spreads uncontrollably in a natural environment, whether it be a forest, heathland, grassland or shrubland.
Depending on the vegetation concerned, we generally distinguish between:
Surface fires, which burn grasses, dead leaves and underbrush.
Crown fires, particularly dangerous, which spread rapidly from tree to tree.
Ground fires, which consume organic matter below the surface and can remain active for several days.
The rate of spread depends on many factors: wind, humidity, temperature, terrain slope and type of vegetation.
Why are wildfires becoming more frequent?
Several factors explain this trend.
Climate change
More frequent heatwaves, prolonged droughts, and decreased soil moisture make vegetation much more flammable.
A few days without rain can be enough to turn a forest into real fuel.
Fuel accumulation
Dead leaves, branches, dry grasses, and underbrush constitute a significant stock of flammable material.
When a fire starts, this vegetation acts as an accelerator.
The wind
The wind is probably the factor that most influences the spread of a fire.
It brings oxygen to the flames, carries embers over several hundred metres, and can cause new fire starts far from the main source.
What are the main causes?
Contrary to popular belief, natural fires are relatively rare.
The vast majority of fire starts are related to human activity.
The most common causes are:
cigarette butts thrown on the ground;
poorly extinguished campfires;
barbecues set up near dry vegetation;
welding or grinding work;
agricultural machinery;
vehicles parked on dry grass;
faulty power lines;
malicious acts.
A simple act of inattention can have dramatic consequences.
Why are the first minutes essential?
The majority of large fires start from a source of a few dozen centimetres.
During the first few minutes, a fire outbreak is often manageable.
Once the flames reach underbrush or trees, their spread becomes extremely rapid.
In certain weather conditions, a fire can progress several kilometres per hour.
That is why first witnesses often play a decisive role.
The priority always remains:
to immediately alert the emergency services;
to intervene only if it can be done safely;
to leave the area as soon as the fire becomes uncontrollable.
How to prevent forest fires?
Prevention is the most effective way to reduce risks.
A few simple actions can help avoid the majority of fire outbreaks:
never throw a cigarette butt in nature;
respect fire bans;
clear the surroundings of homes when regulations require it;
avoid work that produces sparks during dry periods;
maintain agricultural and forestry machinery;
never leave a barbecue unattended;
do not park a hot vehicle on dry grass.
Every responsible behaviour contributes to protecting forests.
Who is most exposed?
Certain professions and activities present a greater risk.
Farmers
Combine harvesters, balers and other equipment often work in extremely dry crops.
Public works companies
Welding, cutting or grinding can cause incandescent projections.
Forest managers
Logging and extraction work requires constant vigilance.
Communities
Local authorities must protect natural spaces, roads and sensitive infrastructures.
Individuals
Walkers, campers and homeowners living near forests also play an essential role in prevention.
The consequences of a fire
Beyond the flames, the impacts are considerable.
A fire can cause:
the destruction of homes;
the loss of biodiversity;
air pollution;
soil erosion;
significant economic losses;
risks to populations and firefighters.
Some forests take several decades to regenerate.
First response equipment
When safety conditions allow, having suitable equipment can help limit a fire outbreak before it escalates.
Depending on the situation, this may include:
a suitable fire extinguisher;
a water supply;
brush clearing equipment;
personal protective equipment.
These equipments never replace fire services, but they can help limit damage when used quickly and safely.
A collective responsibility
The fight against wildfires does not rely solely on firefighters.
It also depends on :
local authorities ;
businesses ;
farmers ;
forest managers ;
individuals.
Every action counts.
Preventing a fire is always simpler, less costly and less dangerous than trying to control it once it has spread.
Conclusion
Wildfires today represent a major challenge for civil safety, environmental protection and land preservation.
In the face of climate change and the increase in risk periods, prevention, awareness and the adoption of responsible behaviours remain our best weapons.
Because when it comes to wildfires, the best intervention is the one that prevents the fire from starting.