Europe heatwave raises risks to growth, energy costs and corporate operations

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Europe heatwave risks to growth and energy

Highlights

Allianz reports past heatwaves reduced Europe’s annual GDP by up to 0.5 per cent, exceeding 1 per cent in southern regions.
Cumulative GDP losses could reach 5–7 per cent in France, Germany, Italy, and Spain if the hottest recent years repeat from 2026 to 2030.
MSCI finds 99.8 per cent of 11,215 listed companies face material financial risk from heat, now the top physical climate risk for corporates.

Research points to mounting economic losses

As reported by Financial Times, a growing body of research indicates that extreme heat is imposing wider economic costs across Europe, with Allianz warning that it is emerging as a structural economic risk for the region. The insurer says unusually severe heat stress events have increased sevenfold globally since the 1980s, while Europe is highly exposed because much of its infrastructure and building stock is built to retain warmth rather than cope with persistent heat.

Allianz says previous heatwaves reduced Europe’s annual GDP by as much as 0.5 per cent, and by more than 1 per cent in southern areas. It also points to non-linear effects once temperatures move beyond about 30C, with labour output per hour falling by roughly 3 per cent for every additional degree in the 30C to 35C range, while energy consumption rises about 1.2 per cent per degree above 30C.

The firm also models a medium-term scenario in which the five hottest years recorded between 2014 and 2024 repeat sequentially from 2026 to 2030. Under that scenario, cumulative GDP losses reach between 5 per cent and 7 per cent in France, Germany, Italy and Spain.

Operational strain spreads across European industry

Current temperatures are already disrupting core business activity across the continent. Electricity prices are rising as cooling demand increases and high heat reduces output from parts of the power system, while three French nuclear reactors are offline after river water used for cooling exceeds regulatory temperature limits.

Transport networks are also under strain, with train operators cutting speeds and cancelling services as rails buckle and overhead lines sag in the heat. France and Spain both set new June national temperature records this week, and parts of the region approach or exceed 40C, including 45.1C in Andújar, Spain.

MSCI says extreme heat is now the most serious physical climate risk for companies among major weather hazards. In a study of 11,215 listed companies worldwide, it finds that 99.8 per cent face material financial risk from heat, reinforcing expectations that governments, investors and corporate leaders will devote more attention to climate-linked operating and valuation risks.

In our earlier coverage of the UK’s push to bolster electricity system resilience during hotter weather, we explained how the heatwave and a rising share of renewables are tightening the balance between supply and demand. We also outlined Ofgem’s provisional support for 16 long-duration storage projects under cap-and-floor contracts, aimed at strengthening the grid during periods of peak stress and helping limit price spikes when cooling demand surges.

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