Climate Change and Wildfires in the Iberian Peninsula: A Study on the Impact of Extreme Weather Conditions
A recent study by the World Weather Attribution group revealed that the hot and dry conditions that fueled the recent wildfires in the Iberian Peninsula were made 40 times more likely by climate change. The fires, which broke out in Spain and Portugal in late July, spread rapidly due to strong winds and exceptionally warm and dry weather brought on by a prolonged heatwave. In Spain, the heatwave lasted 16 days, with temperatures soaring 4.6C higher than the historical average.
Clair Barnes, a researcher at the Centre for Environmental Policy Imperial College London, described the size of the fires as "astonishing." Over 380,000 hectares have burned in Spain, nearly five times the annual average, while in Portugal, fires have spread across more than 260,000 hectares, almost 3% of the country's landmass and close to three times the annual average.
The World Weather Attribution researchers analyzed temperatures during Spain's hottest 10-day period since 1950, between August 8 and 17. They found that the heatwave, which created ideal conditions for the rapid spread of fires, was 200 times more likely and 3C hotter due to human-induced climate change. Barnes emphasized that hotter, drier, and more flammable conditions are becoming increasingly severe with climate change, leading to fires of unprecedented intensity.
The study also highlighted the broader impact of wildfires in the European Union, with nearly one million hectares burned so far this year, marking the worst wildfire season since records began in 2006. European wildfires have generated 39.4 million tonnes of CO2 emissions between January and now, more than triple the amount emitted during the same period last year. Globally, climate change has extended the wildfire season by approximately two weeks on average, primarily by increasing the availability of fuel through heat and dry conditions.
In conclusion, the study underscores the significant influence of climate change on the frequency and intensity of wildfires, particularly in regions like the Iberian Peninsula. As temperatures continue to rise and extreme weather events become more common, the risk of devastating wildfires is expected to increase, highlighting the urgent need for climate action to mitigate these impacts.