César Alcaraz, a seasoned firefighter with Alicante’s provincial fire service in Spain, recalls his early days on the job when he and his team were overwhelmed by a rapidly spreading wildfire with insufficient resources. Nearly three decades later, as an officer managing multiple concurrent fires, Alcaraz describes his role as akin to an emergency room doctor forced to triage patients due to limited equipment—a situation increasingly common amid worsening wildfire seasons across Europe and beyond.

Recent weeks have seen unprecedented wildfire activity in western Europe, fueled by a sequence of intense heatwaves that have desiccated vegetation. France, Portugal, and Spain have all experienced record numbers of fires for this time of year, with Spain reporting 13 fatalities. The United Kingdom, which historically has had fewer forest fires, saw 19 separate wildfires early last week, prompting experts to warn of a "firewave" of an unprecedented scale.

Across the Atlantic, the impact of wildfires in Canada is extending far beyond the immediate burn zones. Smoke from over 100 fires in northern Ontario caused severe air pollution in Toronto, making it the most polluted city worldwide on one recent day, before drifting into the United States and affecting cities such as New York. Studies have linked Canadian wildfire smoke to approximately 80,000 early deaths in 2023, with significant impacts reported in both the US and Europe.

While there has been a global trend toward fewer hectares burned annually—primarily due to fragmentation of African savannahs by agriculture—the fires that do occur tend to be larger, more intense, and less predictable. Scientists attribute this shift to rising global temperatures and prolonged dry conditions that create abundant and easily ignitable fuel. Such conditions facilitate the spread of fires into new environments including urban areas, parks, and gardens, increasing the danger at the so-called wildland-urban interface.

In France, where authorities recently battled as many as 250 to 300 simultaneous fires, resources are being stretched thin. Julien Marion, head of France’s civil protection agency, highlighted the challenge of managing multiple large blazes at once during a recent visit to the Fontainebleau forest, which was still smouldering from extensive fires.

Spain faces similar difficulties. Firefighters accustomed to managing one or two incidents at a time are now routinely confronted with multiple large fires, complicated by increased vegetation growth following wetter winters and the abandonment of farmland once instrumental in breaking up flammable landscapes. Experts like Juan Caamaño of the Pau Costa Foundation warn that current firefighting capacity is insufficient to contain these extreme events, likening the effort to deploying firefighters on a beach to stop a tsunami.

In the United Kingdom, a notable increase in wildfire occurrence is evident, especially in grasslands rather than forests. The Walthamstow fire in east London earlier this month required 125 firefighters to contain rapidly spreading flames driven by strong winds and dry grasses. Experts warn that even short spells of dry weather can raise the likelihood of ignition to near certainty in some areas. A recent report identified 2025 as the UK’s hottest year on record, with wildfires reported from northern England to Scotland’s Cairngorms national park.

Experts caution that simultaneous wildfires place enormous pressure on emergency services, limiting their ability to redeploy resources. Maria Barbosa, a wildfire scientist at the UK Centre for Ecology and Hydrology, pointed out that fire agencies depend on flexibility to move personnel and equipment, but concurrent large fires erode this crucial capability.

The UK Fire Brigades Union reports a significant reduction in firefighter numbers since 2010, with about 12,000 fewer personnel, exacerbating the challenge of responding rapidly to incidents. The London Fire Brigade has responded by acquiring specialized 4x4 firefighting vehicles and promoting preventive measures such as natural fire breaks and vegetation management, adopting strategies long employed in Australia.

Globally, fire seasons are lengthening and increasingly overlapping, complicating international resource-sharing arrangements among the United States, Canada, and Australia. These overlaps are forecast to expand from a few days to potentially nearly a month annually by mid-century. Researchers attribute this partly to climate change driving more synchronized fire conditions worldwide, with weather phenomena like El Niño and the Indian Ocean dipole amplifying risks in Southeast Asia and Oceania.

Spanish Prime Minister Pedro Sánchez emphasized the urgency of addressing the climate emergency during a visit to an advanced command post in Almería, where crews had recently subdued one of Spain’s deadliest wildfires. Despite this, governments have yet to implement carbon reduction strategies strong enough to limit global warming to 1.5 degrees Celsius by century’s end. Attempts to integrate traditional land management practices, such as prescribed burns, remain limited outside countries like Canada and Australia, which have incorporated Indigenous fire management techniques.

In Europe, policymakers are beginning to respond by approving non-binding wildfire risk management strategies encouraging prescribed burns and habitat diversification, alongside expanding civil protection mechanisms that facilitate cross-border firefighting support. However, experts stress that these steps often come too late or are overwhelmed by the scale of current emergencies.

As Juan Caamaño prepares firefighting teams in Indonesia for an impending "wild burn," he warns that emergency responders are perpetually reacting to crises rather than controlling them. "I have the feeling that we’re always behind the emergency," he said, underscoring the growing challenge posed by a wildfire landscape transformed by climate change and evolving ecological conditions.