Picture this: it\u2019s a scorching summer day in the U.S. You wake up in a cool, comfortable room after a solid night\u2019s sleep. You head to work, where the temperature is optimised for concentration. Unless you step outside for a lunchtime walk, you\u2019re completely protected from the heat.<\/p>\n
Now picture the same scenario in an average European city. You wake up after a night of tossing and turning. You\u2019re sticky, uncomfortable, and already dreading the commute. Jammed on a crowded train, you suffer through a heavy delay as your city\u2019s transport infrastructure struggles in the face of extreme temperatures. If you\u2019re working from home, the only relief comes from a fan slowly circulating warm air around the room.<\/p>\n
The fundamental difference between these two realities? Air conditioning.<\/p>\n
In the U.S., 90%<\/a> of households have AC. In Europe? Just 20%<\/a> on average. In some countries, such as the UK, that number falls to less than 5%<\/a>.<\/p>\n At first glance, this might seem like a minor difference \u2014 fodder for TikTok skits<\/a> or Reddit <\/a>debates, where Americans and Europeans poke fun at each other\u2019s respective abilities to handle summer weather. But when the temperature rises, the impact on productivity is anything but trivial.\u00a0<\/p>\n Europe\u2019s growing productivity gap with the U.S<\/a> \u2014 which has widened since the pandemic \u2014 isn\u2019t just a result of regulation, labor laws, or tech prowess<\/a>. It\u2019s now also about climate. Or, more precisely, the difference in how we experience extreme temperatures.<\/p>\n Heat is an existential threat to some European economies<\/p>\n Europe is the fastest-warming<\/a> continent on Earth. Across the primarily AC-free nations, heat waves can (and increasingly do) shut down schools<\/a>, disrupt businesses<\/a>, and make it impossible for people to function at their best. Employers are forced to shift working hours to protect staff from the heat, those with caring responsibilities struggle to look after the most vulnerable (children, the elderly) and families are caught in a daily battle for comfort and efficiency. This climate vulnerability isn\u2019t just inconvenient, it\u2019s a serious threat to economic competitiveness.<\/p>\n Economists are already warning<\/a> that Europe\u2019s failure to adapt to a hotter future could dampen its growth prospects. Tourism too looks set to suffer. As heatwaves become more frequent, particularly in Southern Europe, holiday-makers are starting to look elsewhere<\/a> in search of more comfortable climes. This presents an existential threat to the lifeblood of economies, particularly across the Mediterranean.\u00a0<\/p>\n As the continent struggles to balance the demands of climate change and economic growth, heat is a growing liability.<\/p>\n Public calls for AC are getting louder. In the UK, searches for homes with air conditioning have soared<\/a> and AC is quickly becoming a middle class<\/a> status symbol. In France, politicians like Marine Le Pen have jumped on the bandwagon, announcing a \u201cgrand plan for air conditioning\u201d<\/a>. You might imagine that the solution is simple: copy the US playbook and roll out air conditioning across Europe.\u00a0<\/p>\n Tempting as it may seem, it\u2019s not quite that straightforward.<\/p>\n The grid isn\u2019t up to the job<\/p>\n Air conditioning is electricity-intensive. And most European nations don\u2019t have the grid infrastructure to support a shift of this scale. This fragility was laid bare in Italy<\/a> this summer, when a heat-wave-induced surge in demand for AC triggered blackouts.<\/p>\n Europe\u2019s national grids are straining at the seams: struggling to keep pace with the range of resilience upgrades required for modern consumption, and grappling with the volume of clean energy sources clamouring to connect. (It\u2019s a deep irony that the vast quantities of solar power brought about by hotter, drier summers \u2014 which could unlock AC capabilities without creating a new carbon burden \u2014 can\u2019t be properly harnessed due to grid connection delays.)<\/p>\n Across large swathes of Europe, buildings are also older and poorly insulated<\/a>. Planning restrictions are tighter and the culture of renting rather than owning complicates installation.\u00a0<\/p>\n Collectively, beleaguered grids and logistical challenges means those sweaty nights and lethargic days risk becoming part and parcel of European summers.<\/p>\n To escape this incrementally hotter bind and unlock US-style levels of productivity that AC-enabled environments can bring, we need smarter infrastructure and more investment in it.<\/p>\n That means using advanced modelling and AI to understand where grids are weakest, how demand is shifting, and where small, targeted upgrades could unlock big gains. It means simulating future heat scenarios to stress-test energy networks before a crisis hits or a capacity expansion is attempted. It means replacing guesswork with precision so that investments in cooling \u2014 and the infrastructure behind it \u2014 actually pay off.<\/p>\n Only with this kind of intelligent planning can Europe move fast enough to adapt to a hotter future \u2014 without burning out its grids, budgets, or climate goals in the process.<\/p>\n Air conditioning may be the fix, but without addressing the underlying infrastructure challenges, Europe will continue to sweat through the heat and suffer the economic consequences. And across the pond? Well, the Americans are just waking up from a great night\u2019s sleep.\u00a0<\/p>\n The opinions expressed in Fortune.com commentary pieces are solely the views of their authors and do not necessarily reflect the opinions and beliefs of\u00a0Fortune.<\/p>\n Introducing the 2025 Fortune Global 500<\/strong>, the definitive ranking of the biggest companies in the world. Explore this year’s list.<\/a>