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Americans claim 'mysterious mist' with 'strong smell' is making them sick within minutes of exposure

Published 09/01/2025 às 16:34
mist
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Residents across the United States are reporting exposure to a mysterious mist, described as having a “strong odor” and causing symptoms of illness within minutes of contact. Authorities are investigating the phenomenon.

Parts of the United States were recently blanketed in an unusually dense fog, described as a “mysterious fog” by local residents. The phenomenon has caused concern, especially due to reports of a strong smell “chemical” and flu-like symptoms after brief exposures.

A Florida resident shared with the Daily Mail your alarming experience: “Within about an hour, I kept sneezing nonstop for about three hours, and my eyes were really swollen. I felt really hot, like I had a fever, and my stomach was cramping.”. Exposure to the fog lasted only 10 minutes.

Furthermore, images circulating on social media show particles floating in the fog, which has generated theories that the phenomenon could be related to biological experiments or unnatural events.

Mist recalled the Secret Operation of the 1950s

The situation rekindled memories of the so-called “Operation Sea-Spray”, conducted by the US Navy in 1950.

In this experiment, the bacteria serratia marcescens e bacillus globii were sprayed over the San Francisco Bay Area to assess the vulnerability of large cities to biological attacks.

The test resulted in at least one death and several serious illnesses, raising ethical and public safety questions.

While there is no official confirmation of any link between the current haze and similar actions, the US government's history of experiments has fueled suspicions on social media.

A user used their flashlight to illuminate particles floating in the fog. Tiktok/@spfphotographyfl

Social networks and conspiracies

Conspiracy theories have spread quickly. Users on TikTok and Twitter have shared stories and videos. Many claim the fog has a strange smell and metallic taste, described as similar to the smell of sulfur or fireworks.

A popular video shows a user reporting: “The taste and smell are like after setting off too many fireworks. That sulfur smell. It's scaring me."

Another resident, from Kansas, claimed to have seen “large amounts of chemtrails” in the sky before the formation of fog in your region.

Additionally, the haze has been dubbed “Fogvid-24” by users, in reference to the physical toll it takes. Reports of unexplained fatigue following exposure have also been highlighted, fueling panic in some states.

Natural Explanation for the Phenomenon

Experts in meteorology and environmental health, however, offer more plausible and less alarming explanations.

Fog, technically a formation of water droplets or ice crystals near the Earth’s surface, occurs when air reaches its dew point—the point at which it has reached its maximum moisture-holding capacity. This saturation, combined with pollutants in the air, can create characteristic odors, especially in urban areas.

“It is common for fog to absorb pollutants and odors from the environment. This may explain the pungent odor reported by many residents,” an expert explained to Daily Mail.

Additionally, direct illumination of fog, as shown in videos on social media, can highlight floating particles, creating an unusual and perhaps alarming visual appearance.

Climatic factors and fog season

Fog formation is more frequent in the autumn and winter months, when lower temperatures favor the phenomenon.

Experts indicate that the increase in the number of reports may be related to weather conditions typical of this time of year.

Although haze is generally harmless, it can cause respiratory discomfort due to high humidity levels, especially for people with pre-existing conditions such as asthma.

While official investigations continue, the recommendation is simple: avoid prolonged exposure to the haze, especially in areas where symptoms have been reported.

Relevant information

Despite the impact caused, health and meteorological authorities have not yet found concrete evidence that the phenomenon is related to intentional human actions.

Additional atmospheric studies have been initiated to determine if there is anything unusual in the chemical composition of the haze observed in recent days.

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Fabio Lucas Carvalho

Journalist specializing in a wide range of topics, such as cars, technology, politics, shipbuilding, geopolitics, renewable energy and economics. I have been working since 2015 with prominent publications in major news portals. My degree in Information Technology Management from Faculdade de Petrolina (Facape) adds a unique technical perspective to my analyses and reports. With over 10 thousand articles published in renowned media outlets, I always seek to bring detailed information and relevant insights to the reader. For story suggestions or any questions, please contact me by email at flclucas@hotmail.com.

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