Global Firefighting Strained by Concurrent Wildfires

Extreme fire weather conditions happening across countries at the same time make wildfires even more challenging to tackle.

Published on Feb. 24, 2026

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New research reveals that the most high-risk conditions for fires are increasingly happening across countries at the same time, making resulting wildfires even more challenging to tackle. Scientists found this synchronized extreme fire weather has increased strongly worldwide since 1979, becoming more widespread throughout regions, not just more frequent in single locations. This shortens the window for firefighting coordination, potentially straining existing international firefighting cooperation efforts.

Why it matters

When these widespread high-risk days occur, there is more fire activity and worse air quality in several regions, not just locally. This puts unneeded pressure on firefighting agencies, as simultaneous fire weather reduces the number of days when resources can be shared across international borders or state divisions within countries, ultimately making wildfires more difficult to deal with at the most threatening times.

The details

The study found that more than half of the observed increase in synchronized extreme fire weather is driven by human-caused climate change, while natural climate variability can strongly amplify synchronicity in some regions. Regions like Europe and Southeast Asia, and fire-prone countries like the US, Canada and Australia, have established firefighting cooperation systems, but when extreme fire weather happens in many places at once, it increases the likelihood of widespread fire outbreaks and strains firefighting capacity, as crews, aircraft, and equipment can't be easily shared when everyone needs help at the same time.

  • The analysis found the annual average number of days with simultaneous inter-regional fire weather in lower- to mid-latitude regions, including South America, Central and East Asia, Africa, and the mainland United States, was three to seven times higher during 2001–2024 than during 1979–2000.
  • In Europe, during the top 25% of years with the highest number of synchronous fire weather days, population exposure to fire-sourced air pollution is almost 200% higher than in other years.

The players

University of East Anglia (UEA)

A public research university in Norwich, England, and home to the Tyndall Centre for Climate Change Research.

University of California, Merced (UC Merced)

A public research university in Merced, California, and home to the Sierra Nevada Research Institute.

Dr. Matthew Jones

Researcher at the Tyndall Centre for Climate Change Research at the University of East Anglia.

Dr. Cong Yin

Researcher at the University of California, Merced and the Chinese Academy of Sciences.

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What they’re saying

“The rise in extreme fire risk days that happen at the same time puts unneeded pressure on firefighting agencies, with simultaneous fire weather reducing the number of days when resources can be shared across international borders or state divisions within countries.”

— Dr. Matthew Jones, Researcher, Tyndall Centre for Climate Change Research at UEA (Mirage News)

“Currently, regions such as Europe and Southeast Asia, and fire-prone countries such as the United States, Canada and Australia, have established bilateral and multilateral firefighting cooperation systems, which have been effective in managing recent major wildfires.”

— Dr. Cong Yin, Researcher, UC Merced and Chinese Academy of Sciences (Mirage News)

What’s next

The researchers warn there is an urgent need for "more robust and adaptive" strategies in global fire management to address the challenges posed by the growing synchronicity of extreme fire weather conditions.

The takeaway

This study highlights how the increasing overlap in fire-danger seasons across regions can strain international firefighting cooperation efforts, emphasizing the need for coordinated global strategies to prepare for an increasingly fire-prone future and mitigate the compounding effects on air quality, public health, and fire management.