Social media accounts are spreading unsupported claims that the United States is responsible for the heat wave currently affecting Europe [1].

These allegations highlight the rapid spread of climate-related misinformation during extreme weather events. By attributing natural or systemic weather patterns to specific foreign technologies, these narratives can strain international relations and distract from established meteorological data.

Some online posts suggest that emissions from U.S. air-conditioners are the primary driver of the high temperatures [2]. However, evidence does not support the idea that these appliances caused the heat wave [2].

Other theories circulating this month target the High frequency Active Auroral Research Program, known as HAARP [3]. This U.S.-run research program has been accused by some social media users of causing extreme weather and earthquakes [3].

Experts and reports said that these claims lack a factual basis. The current heat wave is part of a broader pattern of unusually high temperatures affecting multiple countries across the European continent [1].

Despite the lack of evidence, the theories continue to circulate on platforms like YouTube and X. The narrative often suggests a deliberate or negligent action by the U.S. government or private sector to manipulate the environment [1], [3].

Fact-checkers said that the accusations regarding HAARP are recurring, as the program is frequently targeted during periods of natural disaster or extreme weather [3]. Similarly, the claims regarding air-conditioning emissions ignore the scale and physics of global atmospheric movement [2].

“Evidence does not support the idea that these appliances caused the heat wave”

The emergence of these theories during the July 2026 heat wave demonstrates how atmospheric phenomena are increasingly weaponized in digital misinformation campaigns. By linking complex weather events to specific U.S. entities, these narratives attempt to provide simple, adversarial explanations for climate instability, regardless of scientific validity.