Mysterious Fog in the US , Canada and UK: A dense, eerie fog with a "burning chemical-like smell" has spooked a good part of North America and parts of the United Kingdom and Canada. With social media amplifying all concerns, this phenomenon has sparked attention across all social media platforms. However, at the heart of this mysterious fog are a conjunction of natural events, social psychology, and environmental conditions that culminated in all the conspiracy theories and public health fears. Here's a closer look at the mysterious fog, its potential causes, and the societal response it has triggered.

Fog that Feeds Fear

The first reports of this "mysterious fog" came in from Florida where a resident said that they experienced respiratory symptoms, feverish warmth, and stomach cramps after contact with the fog. Similar stories started flooding social media, and within a day or two, a sinister force seemed to sweep across the United States, Canada, and parts of the UK. From Texas to Minnesota, people reported weird odors and health issues that they thought were linked to this bizarre atmospheric event.

Some witnesses were said to see "white particles" swirling through the air; theories ranged from a chemical attack or experimental weapon to drone-related chemical dispersals and references to historical military experiments, such as the infamous 1950s "Operation Sea-Spray."

Fuel to the fire were added when videos and posts, hundreds of thousands in number, began circulating on social media sites like TikTok and X (formerly Twitter) speculating on the origin of the fog. Hashtags like #ToxicFog went trending for days. Hysteria created a self-reinforcing loop in which every post spurred further scrutiny and fear.

Scientific Explanation of the Dense Mysterious Fog

1. What is Fog?

Fog is essentially a low-lying cloud formed when the air temperature cools to its dew point, causing water vapor to condense into tiny droplets or ice crystals. Several types of fog—advection fog, radiation fog, and valley fog—can form depending on conditions such as warm, moist air moving over cooler land or when temperatures plummet rapidly under clear skies.

2. Why the Chemical Smell?

Such chemical-like smell as reported during the occurrence of fog events is sometimes attributed to air pollution. It acts like a sponge, where it absorbs these pollutants, which include sulfur dioxide and nitrogen oxides, among others, that emit from industries. This mixture, therefore, leads to a stench that could be mistaken as unnatural or even toxic.

Also Read: Health Concerns Rise As US, Canada, and UK Come Under The Blanket Of Thick, Dense, Toxic Fog

3. What are the Health Concerns?

High moisture levels from fog can significantly exacerbate symptoms related to respiration, but especially in already predisposed asthmatics and allergy patients. The connection of these symptoms with actual fever, stomach cramps, and puffy eyes is too remote. Experts assume that the irritating effects of entrapped pollutants trapped in fog tend to affect more the eyes and throat rather than the rest of the body affected by some report.

Psychological Effects of Mass Panic Caused by Social Media

Social media amplified a natural weather event into a health epidemic. It made the personal experience of individuals become a cause for fear and speculation, a domino effect.

According to psychologists, this is a concept of selective perception, wherein once people's attention is drawn to environmental anomalies, they begin to notice them. This mirrors earlier panics, such as the Seattle windshield pitting panic of 1954. Then, atomic bomb testing caused fear in many and started to have people looking at their windshields for small marks that they had not seen before. Likewise, postings on the strangeness of the fog probably increased public awareness and suspicion, with people looking to attach unrelated symptoms to the phenomenon.

The fog hysteria shares a commonality with other instances of mass panic, such as the "drone sightings" of recent years or the Cold War-era fears of biological warfare.

Also Read: Mysterious Fog Is Making Americans Sick

These events underscore how fear can cloud judgment, especially when amplified by social media and sensationalist headlines. While historical cases, such as "Operation Sea-Spray," offer concrete evidence of the existence of unethical experiments, the jump from a natural weather condition to theories of chemical attacks exemplifies a more modern trend of connecting unrelated dots, all wonderfully seeded in distrust and anxiety.

Despite the swirling rumors, meteorologists and scientists are in agreement that the mysterious fog is not as alarming as it seems. It is well known that fog traps and amplifies pollutants, especially in urban and industrial regions. Moreover, winter months are the most conducive for fog formation, so its recent prevalence is unsurprising.

On the other hand, environmentalists advise that the fog should wake everyone up to increased levels of pollution. The reported odors and health irritations could be just symptoms of far deeper systemic issues like industrial emissions and lack of control over air quality.

The authorities must be transparent in their communication to combat misinformation and allay public fears. Governments and environmental agencies must provide timely updates on weather phenomena, air quality, and health risks. Initiatives like real-time pollutant tracking and public education campaigns can help demystify natural occurrences while addressing valid environmental concerns.

The mysterious Canada fog is a compelling case study in how environmental events intersect with psychology and societal dynamics. While rooted in natural phenomena, the fog became a vessel for collective fears, amplified by modern technology and historical anxieties.

In this information era where communication occurs at an almost lightning pace, the fog becomes a metaphor that reminds everyone about scientific literacy, environmental responsibility, and an effective balance when considering public concern. Whether perceived as a marvel of nature or as a tale that serves to teach, it left a very powerful mark in people's minds.

Finger-prick test for Alzheimer's could actually change its diagnosis. An international research trial is exploring if a simple finger-prick blood test could one day help diagnose Alzheimer's disease much earlier and more easily than current methods. The study has involved 1,000 volunteers aged over 60 from the UK, the UK, and Canada, and aims to detect biological markers in the blood linked to the condition.

If the test is successful, it could shift the Alzheimer's diagnosis. The test has the potential to make the diagnosis cheaper, which may not require expensive scans and invasive procedures.

Why Is This Finger-Prick Alzheimer's Test So Important?

Alzheimer's disease does not begin when memory problems become obvious. Research also shows that abnormal proteins linked to the disease, particularly amyloid and tau, can start building up in the brain more than a decade before symptoms appear.

By the time cognitive changes become noticeable, these damage may already occur. This is why such a test is important to ensure that the condition is diagnosed early. New treatments work best in early stages, which makes it more so important.

How Does The Finger-Prick Test Work?

The trial is examining three specific proteins in the blood that have been strongly associated with Alzheimer’s disease. By measuring their levels and concentration, researchers hope to identify whether someone may be at risk, even before symptoms develop.

All volunteers are also undergoing existing gold-standard tests. These include specialized brain scans using radioactive tracers or lumbar punctures to collect cerebrospinal fluid. These methods are accurate but costly, time-consuming, and invasive. As a result, only a small fraction of patients currently receive them.

One of the biggest advantages of the finger-prick test is that it is simple. Unlike traditional blood tests, this test does not require needles, hospital visits or refrigeration. In the future, it could potentially be done at home, with samples mailed to a laboratory for analysis.

Experts say this could dramatically shorten the time it takes to receive an accurate diagnosis. Many families currently wait months or even years, often navigating multiple appointments before getting clear answers.

Participants have also chosen to take a part due to their personal experience with dementia in the families. For them, the possibility of early screening and new treatment is a way to avoid worsening the condition. Participants who have received negative results describe relief, while also recognizing that individual outcomes are just one part of a much larger study. Researchers will only know how effective the test truly is once data from all participants has been analyzed.

What Happens Next?

So far, 883 volunteers have enrolled, with more than 360 completing every test required. The group includes cognitively healthy individuals, people with mild impairment, and those in the early stages of Alzheimer’s. At least a quarter of participants come from under-represented communities. The trial is also expected to run until 2028.

After a brief period of clear sky, and better air quality index levels (AQI), Delhi is again engulfed with thick layer of smog. Delhiites on Monday morning woke up with the AQI of 418, under the 'severe' category. As per the data released by the Central Pollution Control Board (CPCB), the AQI in the ITO area was recorded 434, Rafi Marg at 417, and areas around Swaminarayan Akshardham temple at 455. All under 'severe' category.

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• Anand Vihar stood at 462
• Ashok Vihar stood at 473
• Bawana stood at 448
• Burari stood at 460
• Chandni Chowk stood at 454
• Dwarka Sector 8 stood at 427
• Mundka stood at 467
• Narela stood at 437
• Punjabi Bagh stood at 434
• RK Puram stood at 439
• Rohini stood at 437
• Wazirpur stood at 472

GRAP IV Reimposed In Delhi

The Commission for Air Quality Management (CAQM) imposed Stage IV of the Graded Response Action Plan (GRAP) on Saturday evening after AQI crossed the 400 mark for the first time in 2026. GRAP-IV is the strictest of all measures, and bans construction activities, along with restrictions on vehicle movement.

What Is Allowed And What Is Not

Under GRAP-IV, all petrol, diesel and CNG stations in Delhi will supply fuel to only vehicles with valid Pollution Under Control Certificate (PUCC).

Vehicles identified through ANPR cameras or other methods and found refuelled without PUCC will be facing penalties.

Verification of the physical certificates or electronic certificates would be done through systems like VAHAN.

Note: These rules do not apply on emergency vehicles on sovereign duty like ambulances, fire tenders and police vehicles. Vehicles carrying essential goods or providing essential services will be exempted too, notified by authorities.

Any vehicle registered outside Delhi and not compliant with BS-VI norms will not be allowed to operate in the city. CNG and electric vehicles, public transport, and vehicles carrying essential goods are exempted.

Trucks or any other carriers that transport construction materials like sand, stones, bricks, cement, ready-mix concrete, debris and similar items, will not be allowed to enter Delhi.

Are Schools Closed Under GRAP-IV?

Under GRAP-IV, physical classes are suspended, and based on previous precedents, educational institutions were directed to shift to online or hybrid learning mode. GRAP-IV restrictions have been reimposed across Delhi and NCR residents, including Gurugram, Faridabad, Ghaziabad, and Gautam Budh Nagar.

Also Read: Delhi Isn't Just Breathing Toxic Air, But Also A Superbug That Resists Antibiotics

Delhi's Air Pollution Continues To Worsen

Delhi is not just breathing toxic air, but also a superbug through its air, which was found in a latest research conducted by the researchers are Jawaharlal Nehru University, published in Nature - Scientific Reports. Apart from the heavy particulate matter or the PM2.5, which are small enough to penetrate through one's bloodstream and cause blockage, Delhi's air also contains airborne bacteria, including staphylococci. The bacteria levels exceed the safety limit by 16-fold as provided by the World Health Organization (WHO).

Will Delhi Use Smog-Eating Surfaces To Deal With Pollution?

The government is pursuing "smog eating" surfaces to deal with the pollution problem in Delhi. While it may sound like a strange thing in India, not to the world. In fact, in the Netherlands these were used to reduce local nitrogen oxide or the NO concentrations in the air, rather than greenhouse gas concentrations.

Smog usually contains a mixture of hydrocarbons, ozone, oxides of nitrogen and sulphur, and particulates. The pollution is caused by both photochemical reactions that involve sunlight, unburned hydrocarbons and nitrogen oxides, along with high concentrations of particulate matter, especially from vehicle exhaust, construction dust and biomass burning.

Read: Explained: What Are Smog-Eating Surface And How Is Delhi Using It To Beat Air Pollution

Environment Minister Manjinder Singh Sirsa announced "smog eating" surface as part of its pollution control plan, for which the government has also signed an MoU with IIT Madras.

The smog eating surfaces will be public surfaces coated with photocatalytic materials like titanium dioxide or TiO2 that is used to degrade pollutants.

Smog contains mainly nitric oxide, nitrogen dioxide, sulphur dioxide, ozone, and particulate matter. When all of these interact with photocatalytic materials, gaseous pollutants convert into less harmful compounds, such as nitrogen oxides become nitrates or decompose into ions. This process is also known as pollutant mineralization.

Jesy Nelson, former Little Mix singer, 34, and her fiancé, Zion Foster welcomed their twins, Ocean Jade and Story Monroe Nelson-Foster were devastated when the doctors broke the news that "they are probably never going to be able to walk, they probably will never regain their neck strength, so they will be disabled". Both the twins were diagnosed with SMA-1, a rare disease, known as the spinal muscular atrophy type 1.

Zion, 27, shared a poem for his eight-month-old warrior little girls. The Sun reported, he said: "They said it’s unlikely you’ll walk, you may not be able to talk, probably won’t be able to hold your head up, that’s what me and Jesy heard – SMA Type 1.

And it became so clear, doctors only go near what they can measure, so what’s certain?

I watch your smiles like sunsets, not promised, but real. I listen to you babble the sweetest melodies, in the moment it makes me wonder, if I keep telling you who I want you to be, what I want you to do, what I expect from you, am I loving you, or am I loving my fear?

If I take you for how God knitted you, just as you are, nothing removed, am I loving you? Am I accepting you?

Story, is your heart okay? Ocean, how’s your mind? I hear strength in your lungs every time you cry, two little warrior girls who already know how to fight.

Honestly, my worry isn’t the milestones, isn’t forcing life to live a different way. My worry is quieter than that, deeper. It’s about accepting you, loving you for who you are right now, without conditions.

No matter what tomorrow brings, and no matter what yesterday was."

What Treatment Jesy Nelson's Daughter Are Undergoing?

Jesy said, "They have had their treatment, thank God. A one-off infusion. That puts the gene back in their body that they don't have. It stops the muscles still working from dying. Any that have gone you can't regain them back."

While she does not reveal the name of the treatment, it is a single dose gene treatment, where patients receive an intravenous adeno-associated virus stereotype 9 carrying SMN complementary DNA encoding the missing SMN protein, as mentions a 2017 study published in The New England Journal of Medicine, or the Zolgensma, a prescribed gene therapy used to treat children less than 2 years old with SMA.

“Now it’s down to constant physio. We’ve been told they’ll probably never walk or regain their neck strength. They’ll probably be in wheelchairs.”

Also Read: Former Little Mix singer Jesy Nelson's Twin Babies Have SMA-1; Signs She Is Asking Other Parents To Look Out For

Jesy Nelson Twins: What Is SMA-1?

SMA-1. a rare disease, known as the spinal muscular atrophy type 1 or the Werdnig-Hoffmann disease is when the muscle weakness appears at birth or within the first six months. This rare condition prevents infants from sitting unassisted and causing severe breathing, swallowing, and sucking difficulties, leading to a poor prognosis without aggressive support. This condition has impacted the twin babies of the former Little Mix singer Jesy Nelson. Her twin babies may never be able to walk. However, she said that her babies will "fight all the odds" after they were being diagnosed with such a rare genetic condition.

Nelson said that there could be some common signs to look out for, which includes floppiness, inability to hold yourself up without support, a "frog-like" positioning of the legs without much movement, and rapid breathing in the tummy.

"If anyone is watching this video and they think they see these signs in their child, then please, please take your child to the doctor, to the hospital, because time is of the essence, and your child will need treatment. And the quicker you get this, the better their life will be," she added.