In brief
Research published in the journal Science indicates that economically damaging wildfires have become four times more frequent since 1980 due to climate change and human developments near wildlands, highlighting a crisis that demands urgent attention. The study emphasizes that such fires disproportionately occur in densely populated areas and during increasingly severe weather conditions fueled by climate change.
WASHINGTON (AP) — A new study reveals that the world's most destructive wildfires are occurring four times more frequently now than they did in the 1980s, attributing this alarming trend to human-induced climate change and the growth of urban areas near wildlands.
Published in the scientific journal Science, the study investigates global wildfires, measuring their impact not just by acres burned but by their economic toll and human costs. This research concludes that there has been a pronounced escalation of 'societally disastrous wildfires' linked to climate change.
A collaborative effort involving Australian, American, and German fire scientists assessed the 200 most damaging wildfires since 1980 based on the financial impact relative to the Gross Domestic Product of affected countries, adjusted for inflation. Lead author Calum Cunningham, a pyrogeographer at the University of Tasmania, noted that the frequency of these disastrous fires has surged approximately 4.4 times from 1980 to 2023.
This data shows beyond doubt that we are facing a major wildfire crisis, Cunningham stated.
The findings indicate that around 43% of the 200 most damaging fires occurred within the last decade. In the 1980s, the world averaged only two catastrophic fires each year, while from 2014 to 2023, this average jumped to nearly nine annually, including a record 13 in the year 2021. The study noted a steep increase in incidents starting in 2015, aligning with more extreme climatic events, a trend that has continued in the years following the study's conclusion in 2023.
Europe and North America have seen the highest number of economically impactful wildfires, particularly in the Mediterranean region encompassing Greece, Italy, Spain, and Portugal, as well as California in the United States, both suffering from climate conditions characterized by sudden drought.
The researchers highlight how the frequency of individual fires causing at least 10 deaths has tripled, pointing to events such as the devastating Paradise fire of 2018, the Lahaina fire in 2023, and those in Los Angeles in 2025 as notable examples.
Cunningham argued that traditional metrics, like acres burned, are inadequate for assessing the true impact of wildfires, as they often overlook the human and economic consequences. The Lahaina fire, despite its smaller scale, had a profound effect due to loss of life and destruction of infrastructure.
The study also emphasizes the difficulty in obtaining comprehensive economic data for global wildfires, which influences the ability to track overarching trends. However, the team managed to amass over 40 years of data from the insurance company Munich Re, supplemented by the International Disaster Database.
Researchers also examined 'fire weather' conditions—hot, dry, windy environments that enhance the likelihood of severe fires—and found these conditions are increasing, driven largely by climate change. Cunningham remarked, That’s indisputable. Climate change is significantly influencing conditions conducive to major fire disasters.
He stressed that while human-driven climate change is exacerbating wildfire frequency and intensity, housing development adjacent to fire-prone areas, known as the wildland-urban interface, and accumulation of wildfire fuel from dead vegetation also contribute to the issue.
This study underscores the reality facing global communities: the economic and social risks associated with wildfires are intensifying, emphasizing the need for proactive measures to mitigate the impact of catastrophic fires.
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