A persistent heat wave swept across Europe over the weekend, breaking temperature records from Switzerland to Denmark and straining infrastructure and healthcare systems in several countries. The phenomenon follows a period of intense heat in Western Europe last week and continues to shift eastward and northward across the continent.

Denmark experienced unprecedented warmth with a record 99 degrees Fahrenheit reported in Odum, north of Aarhus, marking the highest temperature since records began in 1874. Switzerland recorded a high of 102 degrees in Basel, while Germany saw temperatures reaching 104 degrees. In the Berlin area, the heat caused concrete to crack along the A2 Autobahn, leading to closures. Additional damage to roadways across Germany was reported, prompting train operator Deutsche Bahn and others to discourage non-essential rail travel over the weekend, citing serious strain on transportation infrastructure.

The Czech Republic reported its hottest day on record with 105 degrees in the northern town of Doksany, and forecasters suggested temperatures could rise further. Meanwhile, in western Germany’s Dormagen, a nursing home was evacuated after indoor temperatures soared to 95 degrees. One resident died overnight; however, officials have not confirmed a direct link to the heat. The lack of widespread air conditioning in many European buildings has exacerbated the impact on vulnerable populations.

In France, several towns in the east recorded all-time highs exceeding 104 degrees. Although the worst of the heat wave appeared to be receding in some regions, Paris and 36 other areas remained under extreme-heat warnings. The city’s hospitals faced significant pressure, with nearly 3,000 emergency room visits daily, about one-third higher than usual. The Paris public hospital authority, AP-HP, activated emergency protocols across its 38 hospitals. Medical dispatch calls increased by nearly 80% compared to the same period in 2025. Concerns over hospital capacity led to the postponement of the Paris Pride march and the cancellation of a major three-day music festival.

Health officials warned that while the current heat wave surpassed the severity of the 2003 event—responsible for some 15,000 deaths—modern treatments may mitigate mortality, particularly in hospitals. However, with more than 5,700 heat-related deaths recorded in France in 2025, experts expect continued health risks as the heat persists.

In the United Kingdom, temperatures eased somewhat by Saturday, though an amber heat warning remained in place. The country broke its historical June temperature record multiple days in a row, reaching a provisional 99 degrees in eastern England on Friday, surpassing the longstanding 1976 record. Authorities reported four heat-related fatalities last week, including two teenagers found in bodies of water, prompting warnings about swimming in unsupervised areas.

Italy’s capital remained under a red heat alert, with temperatures prompting tourists to seek shade, hydrate extensively, and enjoy traditional seasonal foods such as gelato and fresh fruit. The Italian Health Ministry raised red alerts for 18 cities, including major tourist destinations like Venice, Florence, Bologna, and Milan.

The extreme and sustained heat has drawn renewed attention to the links between climate change and record temperatures. A recent study by the World Weather Attribution project concluded that such a heatwave would have been virtually impossible without human-induced climate change, noting that the likelihood of this event has increased dramatically in recent decades. André Corrêa do Lago, president of the COP30 United Nations climate talks, emphasized the urgency the heat wave brings to accelerating global climate action.

“This extraordinary heat event strengthens the argument for immediate and decisive measures against climate change,” Corrêa do Lago said, highlighting the heightened awareness that recent temperature extremes are generating across Europe.