Last week, London Climate Action Week took place in the British capital, gathering researchers, leaders, and environmental activists. During the conference, temperatures across the UK exceeded 36°C in many areas, forcing a heat-combating event to be canceled due to the extreme weather.
The ongoing heat wave sweeping across Europe is explained by a shifting jet stream to the west, pulling hot air from North Africa onto the continent. High pressure builds and persists for days, creating a heat dome that blocks cloud formation, causing temperatures to surge. Europe is warming faster than any other continent and continues to break temperature records.
Extreme heat waves are no longer anomalies but have become the new norm. They expose the shortcomings of Europe's built infrastructure: poor insulation and inadequate air conditioning. Cities like Paris or London, long known for their long winters and gray skies, are now buckling under the heat.
The consequences can be severe. In 2003, a heat wave killed approximately 70,000 people. The summer of 2022 saw more than 60,000 heat-related deaths, highlighting that adaptation efforts remain insufficient. This year could be even worse.
The UK’s Climate Change Committee stated: 'Britain was built for a climate that no longer exists.' This assessment holds true for much of Europe. Many mayors have recognized the challenge and begun to respond. Paris has committed to planting thousands of trees to reduce the heat-absorbing effect of concrete and stone. The European Union supports new housing development, providing opportunities to design for a hotter climate.
However, older housing presents a major problem. In most EU countries, less than a quarter of housing stock was built after 2000, while nearly half is over 60 years old. Countries like Italy struggle to balance modern functionality with heritage preservation. Common interventions such as tree planting face barriers: Florence’s narrow streets leave no room for greenery, obscured by centuries-old palaces.
Heat is not the only threat; European cities are vulnerable to extreme water events as well. Medieval canals, now buried under 20th-century asphalt, cause flooding during heavy rain. Bologna has 40 kilometers of underground canals, once used for transporting goods, now channeling floodwaters into basements.
The struggle is not only technical but also political. Expanding air conditioning requires a robust power grid, while demand from data centers, electric transport, and automation is rising. Vulnerable populations need to be relocated to higher ground, but mountain regions are losing inhabitants.
This week’s heat wave is a harbinger of the future. European cities and landscapes must adapt to changing climate conditions. Whether Europe succeeds depends on its resolve to build for the future rather than merely preserve the past. For a continent whose identity is deeply rooted in history, this may be its greatest strategic challenge.
