The concept of altering weather patterns was born from the realization that human activities were influencing climate change. American scientists argued that since everyday actions were already affecting the weather, it was justifiable to intentionally modify it for various objectives.
In late 1945, the inaugural discussion on weather modification took place, exploring how various weather control strategies could benefit the U.S. in wartime scenarios. As the Cold War escalated, significant investments were made to advance this research, paving the way for weather to be considered a covert military tool. However, this also led to concerns about the misuse of such technology by certain individuals and organizations. While government bodies avoid discussing this sensitive topic, numerous theories and alleged instances of 'climate engineering' continue to surface online.
10. The Theory That Hurricane Sandy Was a Man-Made Superstorm

Numerous individuals argue that Hurricane Sandy resulted from human-induced climate change, while others claim the storm was artificially created. Even before the storm subsided, conspiracy theories began circulating. Some suggest that President Barack Obama orchestrated the superstorm, which hit the eastern seaboard just a week before the elections, to secure his reelection. Supporters of this theory believe Obama aimed to position himself as the 'hero,' aiding those affected and demonstrating his suitability for the presidency.
Whether a conspiracy or not, Hurricane Sandy appeared to bolster Obama’s presidential campaign. He even gained the support of Republican governor Chris Christie, who praised Obama for keeping his promises during the crisis. At a press conference, Christie stated that despite differing on policies, he had no regrets collaborating with the president, a remark that sparked significant criticism. This fueled further speculation about the storm being engineered, as it seemed Obama was winning over even his opponents.
How could humans possibly create a hurricane? According to conspiracy theorists, this could be achieved through The High Frequency Active Auroral Research Program (HAARP), a government initiative studying the upper atmosphere. They claim HAARP used electromagnetic waves and its SBX platform to generate Sandy. Some also believe HAARP, under George W. Bush and Dick Cheney’s orders, was responsible for creating and directing Hurricane Katrina.
Unsurprisingly, HAARP has denied any involvement in these events.
9. The Lynmouth Flood Was Caused By Cloud-Seeding

In 1952, Lynmouth, a village in Devon, was devastated by 90 million tons of water. The catastrophe resulted in 35 fatalities and left 430 people homeless. Initially labeled an “act of God,” suspicions later arose that rainmaking experiments might have caused the unprecedented flooding. Reports indicated that the area experienced 252 times its normal rainfall during the floods, coinciding with rainfall experiments conducted by the Royal Air Force just a week prior.
While the timing may seem eerie, experts suggest it was merely coincidental. They clarified that the rainmaking experiments involved seeding individual cumulus clouds with iodide or dry ice, causing brief rainfall lasting around 20 minutes. Additionally, the flooding was not isolated to Lynmouth; heavy rains were recorded across West and South Wales.
8. Operation Popeye

Vietnam's monsoon season is already challenging, but during the Vietnam War, the U.S. government sought to prolong it by at least 30 days using cloud seeding with silver and lead iodide. This covert operation, named Operation Popeye, spanned from 1967 to 1972 and aimed to intensify rainfall over key resupply routes, including the Ho Chi Minh Trail.
The operation remained secret until 1971, when a journalist discovered a confidential memo sent to President Johnson. The memo stated: “Laos operations—Continue as at present plus Pop Eye to reduce the trafficability [sic] along infiltration routes & Authorization requested to implement operational phase of weather modification process previously successfully tested and evaluated in some area.”
Journalist Jack Anderson quickly exposed this information, prompting the proposal of an international treaty to ban the use of weather modification in warfare. The ENMOD (Convention on the Prohibition of Military or Any Other Hostile Use of Environmental Modification Techniques) was adopted in 1976 by numerous UN members, ensuring weather manipulation is used solely for peaceful purposes.
While the U.S. government denies Operation Popeye had malicious intent, conspiracy theories about the project persist and show no signs of fading.
7. Yellow Rain

During the Vietnam War, the Hmong people allied with the U.S., which provoked retaliation from Vietnam and Laos in the form of chemical warfare. Witnesses reported seeing a strange yellow rain with an oily consistency that stuck to surfaces. Others claimed to observe helicopters flying low and dispersing the oily substance across the region.
The “yellow rain” appeared to contain acidic properties. Many who encountered it suffered seizures, and some alleged it caused permanent blindness. Similar accounts emerged when Vietnam invaded Cambodia in 1978, with Cambodians reporting identical experiences.
Surprisingly, experts later determined that the yellow rain was actually honeybee feces, debunking the earlier claims as a conspiracy theory. They also found that the toxins present in the substance were naturally occurring, produced by fungi within the bee droppings.
6. The California Drought Was Caused By Geo-Engineering

In May 2013, California declared a state of drought, marking its driest year on record. The dry conditions persisted, and in December, a massive wildfire erupted near Big Sur, consuming over 900 acres of land. The drought extended into 2014, exacerbating the state’s water crisis.
Scientists attributed the drought to global warming and human-induced climate change. However, conspiracy theorists argue that geo-engineering is the true culprit. They claim that aerosols and ionosphere heating have been used to suppress rainfall, turning California into a desert. This, they believe, forces citizens to rely on the government for food, granting it complete control over the population.
Some theorists go further, asserting that natural weather no longer exists. They argue that geo-engineering has disrupted the planet’s climate system, allowing engineers to manipulate weather patterns at will. This, they claim, has plunged America into a state of weather warfare.
5. Solar Radiation Management

Solar radiation management (SRM) involves techniques to decrease solar radiation by releasing reflective chemicals into the atmosphere. The Intergovernmental Panel on Climate Change (IPCC) has highlighted SRM's potential in combating global warming in its Fifth Assessment Report. However, conspiracy theorists remain skeptical, arguing that these claims are a cover for using weather modification for more nefarious purposes.
Promoting SRM as a remedy for global warming is viewed by some as a strategy to secure funding for geo-engineering projects. This is partly because advocates of SRM have linked it to the phenomenon often referred to as chemtrails, a subject of widespread conspiracy theories.
4. Operation Stormfury

Operation Stormfury was initially presented as a noble initiative aimed at mitigating hurricane damage by decreasing wind speeds. Conducted from 1962 to 1983, the project used silver iodide seeding to create artificial convection outside the storm's eye, forming a new eye wall to weaken the hurricane's intensity. Tests on four hurricanes showed wind speeds reduced by up to 30%, suggesting potential success.
Despite these findings, the operation's effectiveness has been disputed. Critics argue that natural hurricanes lack sufficient supercooled water for cloud seeding to work as intended. They also claim that the results were unreliable, as there was no clear distinction between modified and unmodified storms.
Conspiracy theories suggest the U.S. military's true goal was to explore controlling hurricanes for strategic purposes. Under the pretense of reducing storm damage, they allegedly conducted extensive experiments without public scrutiny.
3. HAARP

The High Frequency Active Auroral Research Program (HAARP) is often at the heart of weather modification conspiracy theories. As a real military research organization involved in weather-related studies, HAARP blurs the line between fact and speculation, making it a focal point for conspiracy claims.
A CBC documentary aptly summarized the concerns: “It’s not just conspiracy theorists who worry about HAARP. In January 1999, the European Union labeled it a global concern, urging more transparency about its potential health and environmental impacts. HAARP officials, however, maintain that it is merely a radio science research facility with no hidden agenda.”
While HAARP denies any malicious intent, its secrecy fuels suspicions. The facility’s appearance in Alaska, with its geometric array of antennae and barbed wire fencing, adds to the intrigue. Some theorists even claim the antennae can trigger earthquakes, such as the 2011 Japan quake, by targeting the ionosphere and causing it to snap back with immense force.
HAARP has been accused of causing hurricanes like Katrina, Sandy, Wilma, and Rita. Additionally, some believe it uses shortwave radio signals for mind control experiments on the American public.
2. Chemtrails

According to various conspiracy theories, the lingering trails left by airplanes are not harmless contrails but “chemtrails”—chemicals allegedly sprayed into the atmosphere by government agencies. These theories suggest a hidden agenda behind the visible streaks in the sky.
The chemtrail conspiracy gained traction in the 1990s after the U.S. Air Force released a paper on weather modification. When cloud-seeding was used during the Beijing Olympics to combat air pollution, theorists claimed its true purpose was to eliminate rain clouds before the event. Other theories propose that chemtrails are used for population control, mitigating global warming, or diverting attention from military weapon tests.
Governments maintain that the trails are simply contrails, regardless of how long they linger. However, the chemtrail conspiracy overshadows a genuine concern: contrails may contribute to global warming, a fact often ignored amid the speculation.
1. Europe Is ‘Stealing Rain’ From Iran

Former Iranian President Mahmoud Ahmadinejad believes Europe employs advanced technology to redirect rain clouds from Iran to Europe, causing droughts in targeted regions. During an inauguration speech, he accused Western nations of this conspiracy. Ironically, rain began to fall shortly after his statement.
Ahmadinejad, often labeled a conspiracy theorist and eccentric, has made claims that align with other weather modification theories. He cited an unnamed politician who allegedly predicted 30 years of drought in Iran, Turkey, and neighboring areas. While many dismiss him as irrational, his assertions raise questions about their potential validity.