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.

One in seven Indians, or over 14 percent of the population, suffers from some form of mental health disorder. Amid an increasing treatment gap -- up to 90 percent -- seen in several states, especially in North India, the government today reiterated the plan of launching a second National Institute of Mental Health and Neurosciences (NIMHANS) in the northern states.

NIMHANS-2 was first announced by Finance Minister Nirmala Sitharaman during the Union Budget 2026-27, to deliver specialized care for mental health and neurological disorders in north India.

Health experts and policymakers, as part of the government-led Post-Budget Webinar series, highlighted the growing burden of mental and neurological disorders in India and also stressed the urgent need to strengthen institutional capacity to meet emerging healthcare demands.

"One in seven Indians is affected by mental health disorders, while several states continue to face a treatment gap ranging from 70 to 90 percent," the experts said.

Noting that Non-Communicable Diseases (NCDs) account for over 60 percent of deaths in the country, they added that "neurological and mental health conditions are among the leading contributors to disability-adjusted life years (DALYs)," among the citizens.

Need For Tertiary Neuro-psychiatric Care

To address these, the experts called for ramping up tertiary mental health institutions and expanding specialized services.

The session, moderated by Vijay Nehra, Joint Secretary, Ministry of Health and Family Welfare, highlighted that North India currently lacks adequate tertiary neuro-psychiatric care facilities. These include areas such as:

• advanced neuroimaging,
• neurocritical care,
• specialized neurological services

Further, making a virtual address at the Post-Budget Webinar, Union Health Minister JP Nadda also highlighted the government’s focus on strengthening mental healthcare services in the country.

"NIMHANS-2 will be established in North India to expand advanced clinical care, training, and research," Nadda said.

"In addition, the Central Institute of Psychiatry, Ranchi, and the Lokopriya Gopinath Bordoloi Regional Institute of Mental Health, Tezpur, will be upgraded as regional apex institutions to strengthen mental healthcare services in the eastern and north-eastern regions," he added.

Meanwhile, the experts also stressed the need to improve services in underserved and geographically remote regions, including the northeastern states, through better infrastructure, capacity building, and targeted deployment of trained mental health professionals.

They also discussed strategies for expanding advanced neuro-psychiatric care and reinforcing India’s overall mental healthcare ecosystem. They proposed:

• Adopting a hub-and-spoke model supported by digital health platforms

This would allow tertiary institutions and centers of excellence to provide technical guidance, specialist consultations, and clinical support to district hospitals and community-level health facilities.

"Such a model would strengthen referral pathways and ensure that specialized mental health services are accessible to people even in remote and rural areas," the experts said.

• Integrating services under Tele-MANAS

Both existing and upcoming campuses of NIMHANS must be integrated , as this will enable a robust nationwide tele-mental health network that ensures

• timely counselling,
• psychological support,
• specialist consultations

• Digital follow-up systems

The experts called for the seamless integration of healthcare facilities, aligned with the vision of the Ayushman Bharat Digital Mission and the ABHA ID ecosystem. This, they said, will

• enable continuity of care,
• Improve monitoring of patients,
• Lead to better clinical outcomes

• A national Brain-Mind Cloud Network

The Network proposed under the National Health Mission would connect premier institutions such as All India Institute of Medical Sciences (AIIMS), state medical colleges, and primary healthcare centers through a digitally integrated platform.

It could also facilitate

• unified mental health records,
• AI-based screening tools,
• data-driven clinical decision support systems,
• tele-neuro-psychiatric hubs at regional centers.

California and New Jersey in the US are seeing an uptick in cases of human metapneumovirus (HMPV) -- a virus with no vaccine or treatment.

According to the US Centers for Disease Control and Prevention (CDC), HMPV can cause upper and lower respiratory disease. There is currently no vaccine to prevent it, and no specific antiviral therapy to treat it.

"Most people will recover on their own," the agency noted, but advised people who get sick to drink plenty of liquids, stay home, and rest.

As per the CDC's respiratory dashboard, the cases of HMPV steadily ticked up since November 2025. It accounted for over 5 percent of positive tests the week of February 14 through February 21.

While HMPV is not a "new" virus, having first been discovered in 2001, cases haven't spiked to this level in the US since an outbreak in April 2025, USA Today reported.

The New Jersey Respiratory Surveillance Report cited that about 4 percent of residents in the state are testing positive for HMPV. The HMPV cases, accompanied by RSV, COVID, and flu cases, are surging, increasing the number of people seeking emergency medical care.

As per the public database, WastewaterScan Dashboard, HMPV is rampant in Northern California -- specifically San Francisco, Marin, Vallejo, Napa, Novato, Santa Rosa, Sacramento, and Davis, the Independent UK reported.

What Is HMPV? Is It Dangerous?

HMPV was first discovered in 2001 and is part of the Pneumoviridae family along with the Respiratory syncytial virus (RSV).

HMPV most likely spreads from an infected person to others through:

• the air by coughing and sneezing
• close personal contact, such as touching or shaking hands
• touching objects or surfaces that have the viruses on them, then touching the mouth, nose, or eyes

In the US, HMPV circulates in predictable patterns each year, typically beginning in winter and lasting through spring.

The usually self-limiting and mild symptoms typically last 4 to 5 days. These include:

• cough,
• fever,
• nasal congestion,
• shortness of breath

People at risk include:

• elderly people,
• children,
• people with comorbidities

"The HMPV is not deadly, and there is no evidence of mortality or a severe transmission rate," former Indian Council of Medical Research (ICMR) scientist, Dr. Raman Gangakhedkar, told IANS, during the virus's outbreak in India in 2025.

“The virus may cause pneumonitis-like illness, but the mortality rates are almost unknown so far. HMPV has a global prevalence of about 4 per cent,” he added.

While no vaccine or treatment can prevent HMPV infection, to avoid the infection, individuals must:

Practice good hygiene and cover your mouth and nose with a tissue when coughing or sneezing, or use your elbow, not your hands, for it. And wash your hands properly, especially in healthcare settings.

India is currently working on a vision of preventive and holistic health, said Prime Minister Narendra Modi today, while addressing a series of post-budget webinars.

The Prime Minister highlighted that sectors like health, education, skill, tourism, sports, and culture are the primary vehicles for meeting the goal of “Sabka Saath Sabka Vikas-Fulfilling Aspirations of People”.

Also Read: GLP-1 Weight Loss Drugs Could Now Treat Addiction, Says Study

“India is today working on a grand vision for preventive and holistic health. In the past few years, the country's health infrastructure has been strengthened. Hundreds of new medical colleges have opened in districts,” PM Modi said.

“Through the Ayushman Bharat scheme, access to health services has been extended to every village via wellness centers,” he added.

Emphasizing the vision of preventive and holistic health, the Prime Minister noted the rapid strengthening of health infrastructure and the global popularity of Yoga and Ayurveda.

Demand For Care Economy And Telemedicine

PM Modi specifically drew attention to the emerging 'Care Economy' and the rising demand for caregivers globally, urging experts to develop new training models to empower the youth.

"The population of senior citizens will increase in the country in the coming decade. In many countries of the world, there is a high demand for caregivers,” he said.

"Hence, skill-based employment opportunities for lakhs of youth in the health sector are present. I request that new training models be developed," PM Modi added.

The Prime Minister also spoke about the success of telemedicine in reaching remote areas. However, he stressed the need for further simplifying the user experience and building greater public awareness.

"I believe there is still a need to increase awareness and ease of use in telemedicine," PM Modi said.

Experts Push For Emergency Healthcare Services in India

In a separate session, health experts, policymakers, public health experts, and clinicians deliberated on the Budget Announcement under Para 88: “Strengthening of Emergency & Trauma Care Centers”.

In the Union Budget 2026–27, the Government had announced a major initiative to strengthen emergency healthcare services across the country.

The Government also proposed to strengthen and increase emergency and trauma care capacities by 50 per cent in District Hospitals by establishing emergency and trauma care centers.

The experts highlighted the country's significant burden of emergency medical conditions, including road traffic injuries, heart attacks, strokes, poisonings, burns, snake bites, etc.

While these require timely intervention within the “golden hour” to prevent deaths and long-term disability, emergency beds constitute only a small share of total hospital bed capacity in many district hospitals, highlighting the need for strengthening emergency care infrastructure and systems, the experts noted.

The discussion also highlighted the role of implementation research and data-driven approaches in identifying gaps and improving emergency care systems at the district level.

“Strengthening emergency and trauma care at the district level requires a systematic and outcome-oriented approach that goes beyond infrastructure to focus on performance and service delivery,” said Dr. V.K. Paul, member, NITI Aayog, who moderated the session.

Dr. Paul stressed the need for greater convergence across hospital systems, ambulance networks, and government programs, supported by digital technologies and real-time monitoring.

He also called for continued skilling and upskilling of emergency care personnel to build a strong and responsive emergency care system.