Delhi-NCR’s air pollution crisis escalated to a critical level on Monday, 15 December 2025, with the Air Quality Index (AQI) peaking at 498 in certain areas and remaining firmly in the ‘Severe’ category.

The crisis, the season’s worst, has kept the highest restrictions, Stage 4 of the Graded Response Action Plan (GRAP), in effect.

The severity of the smog has caused widespread travel disruptions and led to multiple international missions, including the Singapore High Commission, issuing health advisories to their nationals. This alarming situation underscores a major public health emergency for the capital.

Smog Tightens Grip as AQI Soars

The National Capital Region is currently grappling with the most severe environmental and public health emergency of the season. Official data from the Central Pollution Control Board (CPCB) confirms the average AQI is in the ‘Severe’ category, with local monitoring stations, such as Jahangirpuri, recording an alarming peak of 498 on Monday, December 15.

This extreme level classifies the air quality as ‘Severe Plus’ and poses a critical danger to all citizens. The hazardous air, trapped by near-calm winds and high moisture, has formed a thick blanket of smog, severely reducing visibility to near-zero and causing widespread complaints of burning eyes and acute respiratory distress among residents.

GRAP-4 Invoked in Delhi

In response to the disastrous air quality, the Commission for Air Quality Management (CAQM) was compelled to implement the full force of emergency action by invoking GRAP Stage 4. This mandates the most severe anti-pollution measures across Delhi and its surrounding NCR areas.

Key restrictions include an immediate and complete ban on non-essential construction and demolition activities. Crucially, strict curbs have been placed on vehicular movement, specifically prohibiting BS-III petrol and BS-IV diesel four-wheelers from operating in the region.

Furthermore, the government has directed that offices operate at 50 per cent capacity and advised schools to implement hybrid learning for junior classes.

Singapore Issues Pollution Advisory

The alarming public health situation was underscored by an unprecedented action from the diplomatic community. The Singapore High Commission in New Delhi issued a dedicated air pollution advisory for its citizens, a rare move that highlights the global concern over Delhi’s air quality.

The advisory urged Singaporean nationals to strictly adhere to the guidelines provided by Indian authorities, recommending they remain indoors, wear high-grade pollution masks when outdoors, and exercise “especially caution.”

This international warning serves as a stark metric of how gravely the capital’s smog is viewed, confirming the crisis is not merely a local issue but a hazardous public health emergency of global concern.

UK and Canada Issue Warnings

Following the Singapore High Commission’s advisory, both the United Kingdom and Canada have reportedly updated their travel and health advisories for the Delhi-NCR region.

While these missions often issue general pollution warnings, the timing and emphasis on the current “Severe” air quality category underscore the severity of the crisis.

These advisories urge their respective nationals residing in or travelling to Delhi to strictly follow all local health protocols, minimise outdoor activity, and take extra precautions, reinforcing the message that the city’s air quality now poses a significant and officially recognised international health risk.

Health Risks from Pollution Exposure

Remaining in severe pollution for extended periods significantly jeopardises health and may lead to:

• Respiratory Illnesses: Increased risk of chronic conditions like asthma, bronchitis and Chronic Obstructive Pulmonary Disease (COPD).
• Cardiovascular Damage: Higher likelihood of heart attacks, strokes and hypertension due to pollutants entering the bloodstream.
• Reduced Lung Function: Permanent decrease in lung capacity, especially in children and the elderly.
• Cancer Risk: Elevated risk of lung cancer from prolonged exposure.
• Cognitive Issues: Potential long-term impacts on the central nervous system and brain health, including memory impairment.
• Weakened Immunity: Compromised immune system, making the body more susceptible to infections.

Safety Measures During Air Pollution

To minimise the health impact of Delhi’s severe air pollution, residents can follow these general safety guidelines:

• Limit Outdoor Exposure: Stay indoors as much as possible, especially during peak pollution hours (early morning and late evening).
• Wear N95/N99 Masks: Use high-filtration N95 or N99 masks when outdoor trips are unavoidable; cloth or surgical masks offer insufficient protection against fine particulate matter.
• Use Air Purifiers: Install air purifiers with High-Efficiency Particulate Air (HEPA) filters indoors to clean the air inside your homes and offices.
• Keep Windows and Doors Shut: Prevent polluted outdoor air from entering by sealing windows and doors tightly.
• Maintain Hydration and Diet: Drink plenty of water and consume food rich in Vitamin C, Vitamin E, and Omega fatty acids, which can help strengthen lung function.
• Avoid Strenuous Activity: Refrain from heavy outdoor exercise like jogging, running, or cycling, as these increase the inhalation of pollutants.
• Consult a Doctor: Individuals with pre-existing conditions (asthma, COPD, cardiac issues), the elderly, and children should consult their doctors immediately if they experience any respiratory discomfort.

The Logical Indian’s Perspective

The annual descent into ‘Severe’ air quality is an unacceptable failure of governance. The fact that emergency GRAP measures and international warnings are now predictable yearly events shows a chronic lack of political will for systemic change.

We demand accountability and a shift from temporary bans to sustained, year-round enforcement of collaborative solutions across all neighbouring states.

The right to breathe clean air is fundamental, and authorities must commit to a transparent, long-term plan to ensure Delhi never again faces this public health emergency.

Disclaimer: This article is for informational purposes only and does not constitute medical advice. For specific health concerns or guidance on air pollution exposure, please consult a qualified healthcare professional.