Mapped: Climate Change's Impact on Extreme Weather Events Globally

Apr 4, 2026, 2:45 AM

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Recent research has mapped how human-caused climate change influences extreme weather events around the world. Since the early 2000s, a new field of climate science, known as "extreme event attribution," has emerged, revealing the extent to which climate change is linked to various weather extremes such as floods, heatwaves, and droughts.

The findings indicate that a significant majority of weather events have been made more likely or severe due to climate change. According to an analysis by Carbon Brief, approximately 71% of the 504 extreme weather events studied were affected by human activity. This includes 93% of assessed extreme heat events, 56% of rainfall or flooding events, and 68% of drought events.

The Evolution of Attribution Studies

Attribution studies assess the human impact on specific weather events by comparing observed data with climate models that simulate conditions without human influence. This scientific approach has gained traction in both academic circles and public discourse because it connects the abstract concept of climate change with tangible experiences of extreme weather. The first major attribution study, published in 2004, linked the European heatwave of 2003 to human-caused climate change, estimating that the risk of such an event had at least doubled due to rising temperatures.

Carbon Brief's interactive map documents over 600 studies, covering nearly 800 extreme weather events and trends. The results from these studies show that 74% of the events were made more likely or severe due to climate change. Conversely, around 8% were found to be less likely or severe, highlighting a complex interaction between climate change and weather patterns.

Types of Extreme Weather Affected

Heatwaves are the most studied and clearly linked to climate change. Of the 152 heat events analyzed, 93% showed that climate change increased their likelihood or severity. Similarly, heavy rainfall and floods also experienced increased risks, with 56% of the events assessed showing human influence. In contrast, drought studies revealed a somewhat more nuanced picture, with 68% of the 81 analyzed events being attributed to climate change impacts.

The map created by Carbon Brief allows users to explore these events globally, providing insights into specific instances where climate change has played a role. For example, the studies indicate that extreme heat events have been significantly amplified in regions such as Australia, where nearly all studies on heatwaves found a human influence.

Impacts Beyond Weather

Beyond immediate weather effects, climate change is also projected to have substantial impacts on agriculture and food security. Extreme weather events have been shown to damage crops, disrupt food production, and threaten livelihoods globally. A recent analysis identified 140 cases of crops being destroyed due to extreme weather, including droughts, floods, and heatwaves. This emphasizes the broader implications of climate change, as agricultural systems become increasingly vulnerable to the changing climate.

Experts emphasize the need for continued research and monitoring of these trends to better understand the evolving nature of climate impacts. The shift towards studying the impacts of extreme weather on human health and agriculture marks a significant step in attribution science, allowing for a more comprehensive grasp of climate change's effects on society and ecosystems.

Conclusion

The research on extreme event attribution continues to evolve, providing critical insights into the relationship between climate change and extreme weather events. As climate change exacerbates the frequency and intensity of these events, understanding their causes and consequences becomes increasingly urgent. The findings serve not only as a warning but also as a call to action for policymakers and communities to address the challenges posed by a warming planet.

With the growing body of evidence, the imperative to mitigate climate change and adapt to its impacts has never been clearer, as the world grapples with the realities of an increasingly erratic climate system.

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