Why Europe’s summer of extremes demands business leadership on climate.
A continent under strain
For the third consecutive year, Europe and the UK have endured a summer defined not by isolated hot spells but by sustained, record-breaking heat. The 2026 heatwaves began unusually early, arriving in late May with temperatures 10 to 15 degrees Celsius above seasonal norms across the UK, France, Spain, Germany and Ireland — shattering all-time records for spring warmth in the process. By June, the pattern had intensified: Copernicus, the EU’s climate monitoring service, confirmed that June 2026 was the hottest June ever recorded for western Europe and the second warmest globally, driven in part by record sea surface temperatures across the Atlantic and Mediterranean. This has been followed by the UK having the warmest July on record, with intraday records broken across the country.
This is not a one-off anomaly. It follows heatwaves in most of the last 5 years. The impact is significant, particularly in relation to health, challenges caused by wildfires and over-heating of systems and equipment not designed to operate in the temperatures, thereafter, creating resultant damage and disruption. The trend line is unmistakable, and business leaders can no longer treat extreme heat as a seasonal inconvenience. It is now a structural risk to health, infrastructure, supply chains and economic stability.
Human and environment toll
The health risks of extreme heat are well documented but frequently underestimated. Heat stress disproportionately affects older people, outdoor and manual workers, pregnant women, and those with pre-existing health conditions. Hospitals across Europe have again reported surges in heat-related admissions, and excess mortality figures.
Heat and drought have also fuelled a dangerous wildfire season. France, Spain and Greece have seen elevated wildfire activity linked directly to dry conditions and drought risk, echoing the catastrophic 2025 wildfire season in which more than 7,700 fires burned upwards of two million hectares across Europe, killed over 30 people, and forced more than 100,000 evacuations. The UK is not immune either — wildfires in Suffolk, Derbyshire, Yorkshire and the Scottish Highlands have devasted large areas impacting habitats and wildlife, not to mention many small fires all attributable to our overheating planet. Rivers running below average flow, cracked farmland, and stressed water supplies compound the picture: this is an environmental crisis playing out in real time, not a distant projection.
Business disruption is already here
For business leaders, the operational consequences are becoming impossible to ignore. Transport networks buckle under extreme heat — rail speed restrictions, buckling roads, and airport disruptions are now a predictable summer feature. Construction and logistics operations face legal and practical limits on outdoor work during extreme heat warnings. Energy demand spikes for cooling strain grids at the same time that low river levels can constrain hydropower and the cooling water needed for thermal and nuclear power generation. Retail footfall drops in some sectors while others struggle with spoiled stock and overwhelmed supply chains. Agricultural output is hit by drought stress, affecting food and beverage businesses further down the chain. And employers face a growing duty-of-care obligation: workforces are less productive, more prone to illness, and increasingly concerned about the conditions in which they are working.
Insurance costs are rising in step. Property damage from wildfires and flooding (heat-driven droughts are frequently followed by intense storms) is pushing up premiums and, in some regions, making certain assets uninsurable altogether. For any business with physical assets, international supply chains, or a workforce spending time outdoors, the era of treating climate risk as a peripheral CSR issue is over. It is now a core operational and financial risk that belongs on the same agenda as cybersecurity or geopolitical instability.
Why business leadership matters now
Governments and international bodies will continue to set policy frameworks, but businesses hold a unique and underused lever: influence over their own operations and, critically, over their supply chains. A single large organisation demanding lower-carbon materials, more efficient logistics, or verified emissions reporting from its suppliers can move markets far faster than regulation alone. Multiplied across an industry, that influence becomes transformative.
This is the moment for business leaders to act — not simply to protect their own operations from disruption, but because they are among the few actors with the scale and reach to bend the emissions curve in time to matter.
A practical call to action
Every business, regardless of size or sector, should be asking three questions this summer:
1. Are we building genuine sustainability into our operations? This means more than offsetting. It means energy efficiency, renewable energy, sustainable supply chains, resilient infrastructure planning, and adapting working practices to protect employees during extreme weather — heat action plans should sit alongside fire drills as a matter of routine preparedness.
2. Do we understand our carbon footprint? Accurate measurement across Scope 1 and 2 is the starting point, and thereafter Scope 3. You cannot manage what you do not measure, and increasingly, investors, regulators and customers will expect transparent reporting as standard rather than an optional extra.
3. Are we using our supply chain influence for good? Every business, whether a multinational or an SME, has suppliers and customers it can influence. Setting clear expectations, rewarding lower-carbon partners, and collaborating on shared decarbonisation goals can create ripple effects far beyond what any single organisation could achieve alone.
Conclusion:
The heatwaves scorching the UK and Europe this summer are not an aberration to be weathered and forgotten by autumn. They are a preview of the operating environment businesses will face with increasing frequency and severity.
Leaders who treat climate action as a genuine strategic priority — reducing emissions, building resilience, and exerting influence across their supply chains — will be better placed to protect their people, their operations and their bottom line.
Those who wait for the next record-breaking summer to force their hand will find the cost of inaction far higher than the cost of leadership today.
The time to act is not after the next heatwave. It is now.