More granular estimates come from a joint study by Dr. Sehrish Usman at the University of Mannheim and ECB economists. The research found that heatwaves, droughts, and floods caused €43 billion in economic losses in 2025 alone — equivalent to 0.26% of the EU’s 2024 gross value added . The study projects that total losses will accumulate to €126 billion by 2029 as second-round effects — lost productivity, disrupted supply chains, and reduced tourism — compound over time .

Allianz Research offered a third estimate, calculating that the heatwaves could shave up to 0.5 percentage points off Europe’s 2025 GDP growth, though the impact varied dramatically across countries: Germany lost an estimated 0.1 percentage points, while Spain — where summer temperatures ran roughly 10°C above normal — faced a hit of up to 1.4 percentage points . For context, a 2021 study of Europe’s worst heat years (2003, 2010, 2015, 2018) found that reduced labour productivity alone cut GDP output by 0.3–0.5%, exceeding 1% in the most exposed southern regions .

Food Price and Inflation Impacts: The ‘Climateflation’ Channel

The heatwave’s impact on food prices was immediate and measurable. ECB analysis published in May 2026 estimated that the summer 2025 heatwave increased unprocessed food prices in the euro area by 0.4 to 0.7 percentage points over a one-year horizon . A separate analysis, looking at the wider effects of heat, drought, and wildfires, found that eurozone food price inflation was likely fueled by around 1–2 percentage points, and warned that household inflation expectations are “especially sensitive” to food inflation .

On the ground, the agricultural damage was severe. In France, record-breaking temperatures damaged corn crops and caused mass poultry deaths. Across southern Europe, parched soils and distressed livestock squeezed supply chains — pigs lost their appetites in Spain, cows produced less milk in the UK . The European Parliament noted in May 2025 that while EU food inflation had stabilized below 3%, the annualised rate had already crept up from 2% in January to 3% in March, with agricultural input prices still 30% above 2020 levels .

Broader Macroeconomic and Financial Stability Concerns

Beyond the headline GDP and inflation numbers, the 2025 heatwave introduced new layers of complexity for eurozone policymakers.

Inflation volatility and policy complexity. ECB President Christine Lagarde has noted that extreme weather events increase inflation volatility, making the central bank’s forecasting and decision-making harder . The ECB’s own research blog from July 2025 concluded that the reduction in regional output from a heatwave is not only significant (about 1%) but prolonged, intensifying to a trough of 1.5% lower after two years .

Growth-inflation risks remain ‘large but balanced.’ Olaf Sleijpen, head of the Dutch central bank, said in December 2025 that the threats to both growth and inflation within the eurozone are “relatively balanced but remain significant,” requiring the ECB to stay flexible on future policy decisions .

Financial stability exposure. The ECB’s May 2025 Financial Stability Review flagged that geopolitical and policy uncertainty had spiked to already high levels, with climate shocks adding to the risk environment for banks and insurers .

Divergent regional impacts create ‘temperature-induced monetary stress.’ Academic research published in 2024 found that the large differences in heat exposure between northern and southern eurozone countries produce significant divergences in how macroeconomic variables respond to temperature anomalies. This “temperature-induced monetary stress” makes the ECB’s one-size-fits-all interest rate policy harder to calibrate, and the research expects this divergence to worsen over time .

Key Caveats

• The 5% GDP-at-risk scenario from the NGFS is a severe tail-risk projection, not a central forecast. It assumes a concatenation of extreme events over a five-year window .
• The €43 billion and €126 billion figures cover all extreme weather (heat, drought, floods) in 2025, not heatwaves alone .
• Some analysts, including Banque de France Governor Emmanuel Moulin, noted that the short-term economic effects of heatwaves can be “somewhat ambiguous” — certain sectors (e.g., tourism, cooling equipment) may benefit — while the medium-term effects are “clearly” negative for growth .

More granular estimates come from a joint study by Dr. Sehrish Usman at the University of Mannheim and ECB economists. The research found that heatwaves, droughts, and floods caused €43 billion in economic losses in 2025 alone — equivalent to 0.26% of the EU’s 2024 gross value added . The study projects that total losses will accumulate to €126 billion by 2029 as second-round effects — lost productivity, disrupted supply chains, and reduced tourism — compound over time .

Allianz Research offered a third estimate, calculating that the heatwaves could shave up to 0.5 percentage points off Europe’s 2025 GDP growth, though the impact varied dramatically across countries: Germany lost an estimated 0.1 percentage points, while Spain — where summer temperatures ran roughly 10°C above normal — faced a hit of up to 1.4 percentage points . For context, a 2021 study of Europe’s worst heat years (2003, 2010, 2015, 2018) found that reduced labour productivity alone cut GDP output by 0.3–0.5%, exceeding 1% in the most exposed southern regions .

Food Price and Inflation Impacts: The ‘Climateflation’ Channel

The heatwave’s impact on food prices was immediate and measurable. ECB analysis published in May 2026 estimated that the summer 2025 heatwave increased unprocessed food prices in the euro area by 0.4 to 0.7 percentage points over a one-year horizon . A separate analysis, looking at the wider effects of heat, drought, and wildfires, found that eurozone food price inflation was likely fueled by around 1–2 percentage points, and warned that household inflation expectations are “especially sensitive” to food inflation .

On the ground, the agricultural damage was severe. In France, record-breaking temperatures damaged corn crops and caused mass poultry deaths. Across southern Europe, parched soils and distressed livestock squeezed supply chains — pigs lost their appetites in Spain, cows produced less milk in the UK . The European Parliament noted in May 2025 that while EU food inflation had stabilized below 3%, the annualised rate had already crept up from 2% in January to 3% in March, with agricultural input prices still 30% above 2020 levels .

Broader Macroeconomic and Financial Stability Concerns

Beyond the headline GDP and inflation numbers, the 2025 heatwave introduced new layers of complexity for eurozone policymakers.

Inflation volatility and policy complexity. ECB President Christine Lagarde has noted that extreme weather events increase inflation volatility, making the central bank’s forecasting and decision-making harder . The ECB’s own research blog from July 2025 concluded that the reduction in regional output from a heatwave is not only significant (about 1%) but prolonged, intensifying to a trough of 1.5% lower after two years .

Growth-inflation risks remain ‘large but balanced.’ Olaf Sleijpen, head of the Dutch central bank, said in December 2025 that the threats to both growth and inflation within the eurozone are “relatively balanced but remain significant,” requiring the ECB to stay flexible on future policy decisions .

Financial stability exposure. The ECB’s May 2025 Financial Stability Review flagged that geopolitical and policy uncertainty had spiked to already high levels, with climate shocks adding to the risk environment for banks and insurers .

Divergent regional impacts create ‘temperature-induced monetary stress.’ Academic research published in 2024 found that the large differences in heat exposure between northern and southern eurozone countries produce significant divergences in how macroeconomic variables respond to temperature anomalies. This “temperature-induced monetary stress” makes the ECB’s one-size-fits-all interest rate policy harder to calibrate, and the research expects this divergence to worsen over time .

Key Caveats

• The 5% GDP-at-risk scenario from the NGFS is a severe tail-risk projection, not a central forecast. It assumes a concatenation of extreme events over a five-year window .
• The €43 billion and €126 billion figures cover all extreme weather (heat, drought, floods) in 2025, not heatwaves alone .
• Some analysts, including Banque de France Governor Emmanuel Moulin, noted that the short-term economic effects of heatwaves can be “somewhat ambiguous” — certain sectors (e.g., tourism, cooling equipment) may benefit — while the medium-term effects are “clearly” negative for growth .