Wildfires across south-western France have forced fresh evacuations from Atlantic coast resorts as firefighters race to consolidate recent gains before another spell of intense heat, dry air and wind raises the prospect of renewed fire activity.

Nearly 4,000 people, many of them holidaymakers, were evacuated from the Lacanau area near Bordeaux after flames threatened tourist accommodation and woodland close to the coast.

The operation added to a much larger displacement across the Gironde and Landes regions, where more than 220,000 people have been ordered from their homes, campsites and holiday properties during the emergency.

The fires have burned more than 42,000 hectares of forest in France, making this the country’s most destructive wildfire crisis in decades.

At least 240 homes have been destroyed and thousands of businesses have suffered disruption, particularly in communities dependent on tourism, forestry, transport and seasonal employment.

The immediate objective for firefighters has shifted in some areas from stopping every flame to protecting populated places, transport links and critical infrastructure.

Firebreaks have been widened, aircraft have dropped water and retardant, and crews have concentrated on the edges of the largest blazes.

Some fronts have stabilised, but stabilisation does not amount to full containment: deep-burning vegetation, embers and changing winds can revive a fire hours or days after its visible flames have diminished.

The Gironde fires have been especially difficult because they are moving through dry pine forest, where heat, resinous vegetation and wind can create fast, unpredictable fire behaviour.

In several cases, the blazes have generated towering fire-induced cloud formations capable of producing their own turbulence, strong gusts and lightning.

Such conditions can rapidly overwhelm conventional firefighting lines.

The next heatwave is therefore central to the emergency.

Forecasts point to another period of high temperatures across much of France, with the south-west facing exceptionally dry conditions.

Heat lowers moisture in vegetation, increases water demand and makes both fresh ignitions and the reactivation of existing fires more likely.

Authorities have restricted access to some forests, closed vulnerable roads and urged residents and visitors to avoid activities that could produce sparks.

President Emmanuel Macron has described the coming weeks as difficult, while the government has mobilised national resources and requested European assistance.

Firefighting aircraft, helicopters and specialist crews from partner countries have been deployed alongside French emergency services.

The scale of the operation reflects the strain of fighting multiple large fires while maintaining protection for towns and resorts across a broad region.

The crisis has become a test of France’s ability to preserve summer tourism without understating the danger.

Resort operators and local officials are attempting to keep unaffected areas open, yet the evacuation of visitors from Lacanau demonstrates how swiftly the calculation can change when fire approaches populated coastlines.

People who have been moved are being directed to emergency accommodation, public buildings and alternative campsites until roads and surrounding woodland can be declared safe.

The human toll remains under assessment.

Firefighters have suffered injuries, and several deaths have been reported in the wider south-western European wildfire emergency.

The confirmed position is that rescue, evacuation and property protection remain the priority while crews continue to examine damaged buildings and remote forest areas.

France’s fires form part of a wider regional disaster.

Spain has also experienced major evacuations and extensive forest loss, with roughly 330,000 people displaced across the two countries during the past week.

Some Spanish communities have begun to lift evacuation orders as conditions improve, while other fires remain active and have required continued restrictions on agricultural work and access to rural land.

The combined emergency has revived a long-running debate over climate adaptation, forest management and the limits of emergency response.

Hotter, drier summers create more combustible landscapes, but the severity of any particular fire also depends on land use, vegetation management, development patterns, ignition sources and the availability of crews and aircraft.

The evidence supports a growing fire risk across southern Europe; it does not mean every individual blaze has a single cause.

For communities in Gironde, the damage is both environmental and economic.

The Landes de Gascogne forest is one of western Europe’s largest cultivated woodland areas and supports timber production, local employment and wildlife habitat.

Burned stands may require years of clearing, replanting and protection before they can return to commercial use, while tourism businesses face cancellations during the busiest part of the season.

The government’s immediate task is to keep evacuation routes open, restore power and communications, and prevent the largest fires from reaching denser settlements.

The longer task will involve rebuilding homes, assessing business losses and reconsidering how towns, campsites and transport corridors are protected in landscapes that are becoming more fire-prone.

Fire crews remain deployed across the Atlantic coast and inland forest zones as temperatures rise again.

Their success over the coming days will depend on whether containment lines hold through the next period of heat and wind.