Potsdam Institute Study Warns One Third of Global Land Habitats Face Compound Climate Extremes by 2085

New PIK research shows a third of land habitats face fires, floods, and heatwaves by 2085. Rapid net-zero action could protect 91% of these vital areas.

By: AXL Media

Published: Apr 25, 2026, 6:28 AM EDT

Source: Information for this report was sourced from EurekAlert!

The Compounding Threat of Sequential Climate Disasters

Global conservation strategies may be fundamentally underestimating the speed and severity of climate-related threats by focusing on gradual temperature shifts rather than abrupt shocks. A new study involving 18 international scientists suggests that by 2085, more than a third of the current land-based habitats for animal species will likely endure overlapping extreme events. According to lead author Stefanie Heinicke of the Potsdam Institute for Climate Impact Research (PIK), the traditional view of a slow climatic transition fails to account for the devastating synergy created when heatwaves, wildfires, and floods occur in rapid succession within the same ecosystem.

Quantifying the Devastation of Consecutive Extremes

The research underscores that while a single event like a flood or fire can cripple a population, the cumulative impact of multiple stressors is far more lethal. The study cites historical data from the 2019-2020 Australian bushfires, where areas previously weakened by intense drought saw a 27 to 40 percent steeper decline in plant and animal species compared to regions facing fire alone. This compounding effect suggests that biodiversity loss is not just a matter of heat tolerance, but a result of a habitat's dwindling ability to recover between different types of environmental catastrophes.

Novel Modeling Reveals Significant Wildfire Exposure

The team utilized advanced climate impact models to look beyond simple temperature metrics, incorporating projections for river flooding and wildfire activity. This methodology revealed a significant scientific blind spot: the sheer scale of future fire risk. Katja Frieler, a co-author and research department head at PIK, noted that wildfire exposure appears to represent a larger threat to animal habitats than drought in many regions. By the year 2050, if current warming trends persist, an estimated 74 percent of land habitats will face heatwaves, while 16 percent will be exposed to significant wildfire activity.