Record temperatures kill thousands, strain electricity usage, increase cooling demand, and drive insurance costs higher as climate threats intensify.

Europe’s latest extreme heatwave, which has already claimed more than 1,300 lives and broken temperature records across at least a dozen countries, is highlighting structural weaknesses in the region’s rapidly growing AI data center footprint.

The phenomenon, driven by a powerful “heat dome” that is pushing temperatures beyond 40 degrees Celsius across Western Europe before moving east, comes shortly after research showed that a large majority of global data center capacity is increasingly exposed to climate-related risks such as heat stress, flooding, and wildfires.

According to one analysis, roughly 79% of such facilities face elevated environmental threats, while over half are located in areas already dealing with sustained heat or water scarcity.

Record temperatures, data center challenges
The human toll of the heatwave continues to climb as record temperatures spread eastward.

The World Meteorological Organization has reported widespread record-breaking conditions, with France alone seeing around 1,000 excess deaths since late June, a significant portion occurring among older individuals in residential settings. Also:

  • Germany has recorded a new national high of 41.5°C
  • France reached 44.3°C
  • Countries across Eastern Europe, including Hungary, Serbia, Romania, and parts of Ukraine, are now experiencing sustained temperatures above 35°C as the heat dome shifts.

Attribution scientists say such an event would have been nearly impossible without human-driven climate change, with unusually high night-time temperatures now far more likely than in previous decades.

As temperatures rise, the energy burden of keeping data centers operational increases sharply. Cooling systems typically account for between 30% and 40% of a facility’s electricity consumption, but that share climbs significantly during extreme heat events.

Major technology firms are already adapting: some have introduced a closed-loop warm-water cooling system designed to minimize or eliminate water use, while others are approaching near-zero water consumption, with pilot designs expected to remove evaporation entirely.

Beyond immediate health impacts, the heatwave is also reshaping how insurers and policymakers assess infrastructure risk. Swiss Re has warned that premiums tied to data center coverage are expected to rise, while S&P Global estimates that demand for such insurance could generate up to US$10bn in new premiums by 2026.

The combination of surging AI-related power consumption and intensifying climate hazards is forcing a reassessment of where and how digital infrastructure is built. WHO Director-General Tedros Adhanom Ghebreyesus has emphasized that heatwaves of this scale are no longer rare, noting that Europe is warming faster than any other continent, at roughly twice the global average rate.