Europe’s heatwave puts pressure on its grid - 26 Jun 2026

As of June 26, today’s news highlights Europe’s heatwave and the pressure it is placing on its grid, alongside significant shifts in European stock markets, particularly within the technology sector. Great Britain’s energy system operator raised the alarm over electricity supplies for the second time this week as the heatwave continued to test Europe’s energy markets. The National Energy System Operator issued a notice late on Thursday asking generators to provide any extra electricity possible on Friday evening to help meet rising demand as households turn on air conditioners and electric fans to cope with the heat. Meanwhile, European technology stocks experienced their worst weekly performance since March, largely due to shifting investor sentiment toward artificial intelligence. This downturn adversely affected metals and mining stocks, contributing to declining energy sector performance. Prysmian saw a fall of 3.5%, joining other underperformers like Safran and Sandvik, as industrial stocks faced pressure amid the broader market downturn. Meanwhile, some defensive sectors such as food and healthcare showed relative strength. Returning to Europe’s heatwave, Britain's energy regulator Ofgem advanced 16 long-duration energy storage projects designed to stabilize the power supply and contain costs amidst rising electricity demand due to a severe heatwave across Europe. This heatwave is stressing power grids, as demand for cooling systems escalates while utilities must curtail production to prevent outages. In another development, Edison has significantly upgraded its wind energy capabilities in Italy, doubling output and investing over 200 million euros in projects aimed at enhancing renewable capacity. Furthermore, EDF said that KKR agreed to buy its North American renewable power business, the latest landmark deal in the rush to amass electricity assets for the AI boom. Financial terms of the transaction weren’t disclosed in an EDF statement today. On the global front, U.S. President Donald Trump accused Iran of breaching a ceasefire agreement following an attack involving drones during cargo transit in the Strait of Hormuz. This incident complicates ongoing diplomatic efforts and further strains the already tenuous U.S.-Iran relations.