{"slug": "this-summers-heat-is-a-live-stress-test-for-data-centers-heres-what-its-in-real", "title": "This summer’s heat is a live stress test for data centers — here’s what it’s revealing in real time", "summary": "This summer's extreme heat has exposed critical vulnerabilities in global data centers, with PJM Interconnection receiving emergency authorization to curtail power in Virginia, French nuclear plants shutting down at 44.3°C, and Zurich Insurance reporting severe weather as the leading cause of loss in its U.S. data center portfolio. A First Street study found 79% of global data center capacity faces high climate risks, while 517 of 809 planned U.S. data centers are in drought-warned areas, raising questions about the industry's preparedness for a warming world.", "body_md": "This summer has already produced three answers to questions the data center industry would have preferred to leave theoretical.\n\nIn May, the PJM Interconnection — the grid operator serving data center-dense northern Virginia — received emergency[ authorization](https://www.energy.gov/documents/doe-emergency-order-no-202-26-23pdf) from the Energy Department to curtail power to data centers due to “atypically hot mid-May weather conditions.” In France, temperatures of 44.3C forced nuclear plants to[ shut down](https://www.technologyreview.com/2026/06/24/1139676/europe-heat-power-plants/) — the same plants Macron called the “heart” of France’s AI ambitions. And on Monday, [Zurich Insurance](https://fortune.com/company/zurich-insurance-group/) disclosed that severe weather is now the leading cause of loss in its U.S. data center portfolio.\n\nThe questions: Can data centers actually hold up in a warming world? And has the industry priced that in?\n\nData centers are having a massive year. So far in 2026, the world’s largest companies operating data centers have committed [at least $750 billion](https://about.bnef.com/insights/data-centers/ai-data-center-build-advances-at-full-speed-five-things-to-know/) to the sector, compared to $450 billion last year, the early stages of [more than $3 trillion](https://www.moodys.com/web/en/us/insights/insurance/the-big-deal-about-data-centers.html) in forecasted capital investments over the next five years, according to Moody’s.\n\nThat spending is now running directly into a stress test nobody scheduled.\n\nA [study](https://firststreet.org/research-library/climate-risk-in-global-data-center-markets-implications-for-investment-and-performance-report) published earlier this month by climate analytics firm First Street found that 79% of global data center capacity faces high risks from climate and weather elements, including from heatwaves and flash flooding. These hazards can disrupt operations, lead to prolonged downtimes, and raise insurance costs, the study found.\n\n**Data centers in hot water**\n\nBecause the U.S. contains some of the world’s largest and fastest-growing data center hubs, its risk profile is sharper than most. Parts of the country that are seeing a surge in new data center construction as well as a rise in costly extreme weather such as flooding or drought include the Carolinas and Virginia, respectively ranked 5th and 6th in climate risk among the 97 global data center markets surveyed by First Street. Of 809 planned U.S. data centers, 517 are located in areas under drought warnings in the past year, according to[ an analysis](https://www.theguardian.com/us-news/2026/jun/08/datacenter-ai-drought-water) by the Guardian.\n\nTexas, home to[ at least 248](https://www.texastribune.org/2026/06/26/texas-data-center-guide-what-you-need-to-know/) planned data center projects, illustrates the tension: the state’s cheap land and sparse population make it attractive to developers, but last year’s historic floods forced sites onto backup diesel generators and cut off repair crews — a preview of what hotter, wetter summers could mean for the country’s fastest-growing data center market.\n\nHigh heat and drought can be just as dangerous. Data centers require extensive cooling equipment to make sure the servers they hold don’t overheat, but high temperatures can cause these cooling systems to fail faster. Data centers operating in these conditions also tend to pay more for energy and water, because they need to consume more to cool their systems down.\n\n**Power cuts and rising insurance bills**\n\nIt’s a similar story in other countries. Out of 8,808 data centers worldwide that were operational late last year, almost 7,000 were located in areas with typical temperatures outside what is considered the optimal range for servers to operate in, according to [an analysis](https://restofworld.org/2025/data-center-heat-map/) by *Rest of World*.\n\nThe French shutdowns underscore a specific vulnerability: data centers don’t just need cooling — they need the power grid to hold up while they’re doing it, and that grid has its own heat problem.\n\nIn the U.S., grid operators have already warned companies managing data centers to be prepared for unexpected changes to service if weather conditions demand. Last month, the PJM Interconnection—which serves data center-dense northern Virginia—announced it had [received authorization](https://www.energy.gov/documents/doe-emergency-order-no-202-26-23pdf) from the Energy Department to curtail power services to data centers and other large loads, due to “atypically hot mid-May weather conditions.” Texas Gov. Greg Abbott has also [requested](https://www.npr.org/2026/06/24/nx-s1-5844303/texas-adopting-stricter-standards-for-data-centers-that-want-to-join-its-power-grid) the state’s independent grid operator to demand operational limits for data centers it provides power to, citing affordability concerns.\n\nAs grids juggle data centers’ rising power needs with the demands of high summer temperatures, insurers are starting to take note.\n\nZurich, a Swiss insurance provider, now counts severe weather as the leading cause of loss in its U.S. data center risk portfolio, [ CNBC reported](https://www.cnbc.com/2026/06/29/ai-data-centers-heatwave-climate-risk-weather.html) on Monday. Those losses and all the ways extreme weather can drain performance, including productivity loss, infrastructure damages, and higher operational costs, could add up to a $3.3 trillion bill for data centers by 2055, according to\n\n[an analysis](https://www.weforum.org/stories/2025/10/data-centres-3-3-trillion-question-heat-cooling/)last year by researchers at the World Economic Forum. Climate-related costs, primarily driven by high heat, would result in losses worth nearly 10% of total data center asset value, the researchers found.\n\n**Subscribe to Fortune Gulf Brief**. Every Tuesday, this new newsletter delivers clear-eyed, authoritative intelligence on the deals, decisions, policies, and power shifts shaping one of the world’s most consequential regions, written for the people who need to act on it.", "url": "https://wpnews.pro/news/this-summers-heat-is-a-live-stress-test-for-data-centers-heres-what-its-in-real", "canonical_source": "https://fortune.com/2026/06/29/data-centers-climate-risk-heat-summer-stress-test/", "published_at": "2026-06-29 17:51:37+00:00", "updated_at": "2026-06-29 18:18:25.417944+00:00", "lang": "en", "topics": ["ai-infrastructure", "ai-safety", "ai-policy"], "entities": ["PJM Interconnection", "Energy Department", "Zurich Insurance", "First Street", "Moody's", "Guardian", "Rest of World", "Texas Tribune"], "alternates": {"html": "https://wpnews.pro/news/this-summers-heat-is-a-live-stress-test-for-data-centers-heres-what-its-in-real", "markdown": "https://wpnews.pro/news/this-summers-heat-is-a-live-stress-test-for-data-centers-heres-what-its-in-real.md", "text": "https://wpnews.pro/news/this-summers-heat-is-a-live-stress-test-for-data-centers-heres-what-its-in-real.txt", "jsonld": "https://wpnews.pro/news/this-summers-heat-is-a-live-stress-test-for-data-centers-heres-what-its-in-real.jsonld"}}