🌅 AI Data Centers Are So Hot They Warm Their Surrounding Areas

SOURCE

Marinoni et al. (2026)

WHAT TO KNOW

• Researchers at the University of Cambridge in the U.K. analyzed more than 8,400 AI data center locations, finding the facilities produce so much heat that they increase the land surface temperature in surrounding areas by 2 degrees Celsius (3.6 degrees Fahrenheit) on average and up to 9 degrees Celsius (16.4 degrees Fahrenheit) in the worst cases. The effect—called the “data heat island effect”—can be felt up to 6.2 miles away from facilities and could impact more than 340 million people globally. The study was published as a preprint, meaning it has yet to be peer reviewed.

WHY IT MATTERS

• Data centers that require massive amounts of electricity to power and cool themselves have become a foundational part of AI-related investment, with total corporate spending on facilities expected to reach $750 billion in 2026, up from $450 billion last year. The acreage of the average U.S. data center has also increased by 144% since 2022, and many modern sites now span well over 1,000 acres, or 1.6 square miles. Beyond heat, data centers can cause noise pollution and consume large amounts of water, straining water supplies if located in drought-stricken areas.

CONNECT THE DOTS

• In late March, U.S. Sen. Bernie Sanders (I-VT) and Rep. Alexandria Ocasio-Cortez (D-NY) announced legislation calling for a nationwide pause on all new data center construction until AI safeguards are in place, including measures addressing electricity consumption and environmental harm. The authors of the present study argue software- and hardware-based tech advancements that improve the efficiency of future data centers and reduce their energy consumption are possible and offer a more sustainable path forward.