Inequality worsens sharply. The bottom 20% of households lose about 4% of their income — roughly 2 percentage points more than the losses for higher-income groups, which range from 1.1% to 1.8% . This means that climate extremes are not merely an inconvenience; they are actively widening the wealth gap within European countries. The study identifies specific damage channels: worsening health and lower labor productivity, reduced food production, and disruption of water-dependent services like transport and energy generation .

Regional hotspots are clear. Not all of Europe is affected equally. The regions that have suffered the largest historical income losses are Madrid (nearly 10% drop), Central Hungary (9.4%), and Central Spain (8.8%) . The study projects that Greek, Spanish, Romanian, Bulgarian, and Cypriot households face the steepest future losses .

Poverty risks soar. The study estimates that at 1.5°C of global warming, about 60 million Europeans could be at risk of poverty from compound climate extremes. At 2.7°C — the trajectory the world is currently on under existing policies and pledges — that number more than doubles, to 127 million people .

Long-term income projections are stark. If warming reaches 2.7°C by 2100, average European household incomes could fall 27% compared to a baseline without further warming. If warming is successfully limited to 1.5°C, the average decline would be roughly 7% .

The study was published as part of the ACCREU project and is available in Global Environmental Change .

The Heatwave That Brought the Study to Life

The same week the study was released, Europe was hit by a catastrophic June 2026 heatwave that broke temperature records across multiple countries. The connection between the academic findings and real-world events was immediate and visceral.

• Deaths: At least 40 people drowned in France while trying to cool off in water; three elderly people died near Bordeaux from heat-related causes; and two young children were found dead in a car in southern France . In Spain, a 90-year-old woman and a 68-year-old man died from heatstroke . The Wikipedia page for the event tallied 282+ deaths across France (58), the UK (15), and Spain (209) .
• Power outages: A heat-related transformer failure in France caused power cuts affecting up to 106,000 households, including 68,000 in Finistère . Blackouts also struck Milan and Turin due to surging air conditioning use .
• School closures: Hundreds of schools in the UK, France, and Germany either closed entirely or switched to shortened schedules, with education unions deeming conditions unsafe for children . In France alone, 845 schools closed and another 1,800 adjusted their hours .
• Transport disruptions: Eurostar cancelled four London–Paris trains, and many UK train services were cancelled, with authorities urging passengers to avoid non-essential travel . Rail services in Belgium, France, and Spain also reduced operations .
• Aging infrastructure: The heatwave exposed just how unprepared Europe is. Only about 20% of European homes have air conditioning, and much of the continent's housing, transport, and energy networks were built for a climate that no longer exists .

Broader Heat Mortality Context

The study's release also coincided with a stark reminder from the World Health Organization's Europe office: over the previous four years, more than 200,000 people across Europe died from heat-related causes, and most of those deaths were preventable . Globally, heat stress is the most lethal environmental hazard, causing nearly 500,000 annual deaths .

The Compound Effect: Why This Study Matters

Schleypen emphasized this point: "When heatwaves and droughts occur at the same time, the damage can be much greater than when they occur separately" . The study’s data bear this out — the compound effect nearly doubles the sum of individual impacts — meaning that policymakers who plan for heatwaves or droughts in isolation are likely to underinvest in adaptation.

The research also finds that the frequency of compound heat-and-drought events is increasing across Europe, consistent with broader academic literature showing that anthropogenic climate change has doubled the frequency of such compounding events in many world regions .

Calls for Stronger Adaptation

"The current heatwave is already threatening people’s health, livelihoods, and ability to work," Schleypen said in the study’s press release . Scientists underscored that Europe is the world’s fastest-warming continent, with temperatures rising at about twice the global average rate, and that aging infrastructure and limited air conditioning make adaptation an urgent priority . The study warns that without rapid emissions cuts and significantly increased investment in adaptation — especially for the most vulnerable households — inequality and poverty in Europe will worsen substantially over the coming decades .

Inequality worsens sharply. The bottom 20% of households lose about 4% of their income — roughly 2 percentage points more than the losses for higher-income groups, which range from 1.1% to 1.8% . This means that climate extremes are not merely an inconvenience; they are actively widening the wealth gap within European countries. The study identifies specific damage channels: worsening health and lower labor productivity, reduced food production, and disruption of water-dependent services like transport and energy generation .

Regional hotspots are clear. Not all of Europe is affected equally. The regions that have suffered the largest historical income losses are Madrid (nearly 10% drop), Central Hungary (9.4%), and Central Spain (8.8%) . The study projects that Greek, Spanish, Romanian, Bulgarian, and Cypriot households face the steepest future losses .

Poverty risks soar. The study estimates that at 1.5°C of global warming, about 60 million Europeans could be at risk of poverty from compound climate extremes. At 2.7°C — the trajectory the world is currently on under existing policies and pledges — that number more than doubles, to 127 million people .

Long-term income projections are stark. If warming reaches 2.7°C by 2100, average European household incomes could fall 27% compared to a baseline without further warming. If warming is successfully limited to 1.5°C, the average decline would be roughly 7% .

The study was published as part of the ACCREU project and is available in Global Environmental Change .

The Heatwave That Brought the Study to Life

The same week the study was released, Europe was hit by a catastrophic June 2026 heatwave that broke temperature records across multiple countries. The connection between the academic findings and real-world events was immediate and visceral.

• Deaths: At least 40 people drowned in France while trying to cool off in water; three elderly people died near Bordeaux from heat-related causes; and two young children were found dead in a car in southern France . In Spain, a 90-year-old woman and a 68-year-old man died from heatstroke . The Wikipedia page for the event tallied 282+ deaths across France (58), the UK (15), and Spain (209) .
• Power outages: A heat-related transformer failure in France caused power cuts affecting up to 106,000 households, including 68,000 in Finistère . Blackouts also struck Milan and Turin due to surging air conditioning use .
• School closures: Hundreds of schools in the UK, France, and Germany either closed entirely or switched to shortened schedules, with education unions deeming conditions unsafe for children . In France alone, 845 schools closed and another 1,800 adjusted their hours .
• Transport disruptions: Eurostar cancelled four London–Paris trains, and many UK train services were cancelled, with authorities urging passengers to avoid non-essential travel . Rail services in Belgium, France, and Spain also reduced operations .
• Aging infrastructure: The heatwave exposed just how unprepared Europe is. Only about 20% of European homes have air conditioning, and much of the continent's housing, transport, and energy networks were built for a climate that no longer exists .

Broader Heat Mortality Context

The study's release also coincided with a stark reminder from the World Health Organization's Europe office: over the previous four years, more than 200,000 people across Europe died from heat-related causes, and most of those deaths were preventable . Globally, heat stress is the most lethal environmental hazard, causing nearly 500,000 annual deaths .

The Compound Effect: Why This Study Matters

Schleypen emphasized this point: "When heatwaves and droughts occur at the same time, the damage can be much greater than when they occur separately" . The study’s data bear this out — the compound effect nearly doubles the sum of individual impacts — meaning that policymakers who plan for heatwaves or droughts in isolation are likely to underinvest in adaptation.

The research also finds that the frequency of compound heat-and-drought events is increasing across Europe, consistent with broader academic literature showing that anthropogenic climate change has doubled the frequency of such compounding events in many world regions .

Calls for Stronger Adaptation

"The current heatwave is already threatening people’s health, livelihoods, and ability to work," Schleypen said in the study’s press release . Scientists underscored that Europe is the world’s fastest-warming continent, with temperatures rising at about twice the global average rate, and that aging infrastructure and limited air conditioning make adaptation an urgent priority . The study warns that without rapid emissions cuts and significantly increased investment in adaptation — especially for the most vulnerable households — inequality and poverty in Europe will worsen substantially over the coming decades .