Diwali Celebrations Face Hazardous Winter Air Across South Asia

Diwali celebrations, starting this Sunday, are coinciding with the return of hazardous winter air across South Asia, particularly in northern India, raising significant concerns about safe festivities, according to Phys.org. This seasonal challenge also brings severe smog to parts of Pakistan and China, where warmer air layers can trap colder air and pollution near the ground. In addition to fireworks, the broader issue of air pollution in India, Pakistan, and other parts of South Asia is exacerbated by traffic, factories, dust from construction, and the burning of crop residues and waste. Weak winds and stagnant winter air further allow these pollutants to accumulate, making the air quality problem an "all-year-round problem in our country," as noted by Shweta Narayan, a public health expert at the Global Climate and Health Alliance, with firecrackers adding to the issue.

Experts stress the importance of simple steps to reduce exposure to harmful pollutants, regardless of location or season. These include regularly checking the air quality index (AQI), wearing a well-fitting mask, and utilizing air purifiers indoors. India's AQI system categorizes pollution levels, with 201–300 indicating "poor," 301–400 "very poor," and 401–500 "severe," where severe levels can harm even healthy individuals. It is recommended to check government or privately run websites for local pollution data, focusing on nearby monitoring stations and recent updates, as citywide averages can obscure highly polluted neighborhoods.

The situation is particularly dire in Delhi, where fine particle pollution averaged approximately 19 times the World Health Organization's annual guideline last year, and air pollution monitors have frequently maxed out their readings in recent years. While Delhi authorities have implemented temporary construction, industrial, and vehicle restrictions, public health experts argue these measures often fall short of addressing the root causes. The city, home to over 20 million people, is also pursuing a long-term strategy to promote electric vehicles. Dr. Arvind Kumar, a chest surgeon at Medanta hospital near Delhi and founder trustee of the Lung Care Foundation, advises using properly fitted N95 or N99 masks outdoors during periods of heavy pollution. These masks, available at pharmacies and hardware stores, are designed to capture at least 95% and 99% of airborne particles, respectively, though they do not filter harmful gases. Proper mask use, covering the nose, mouth, and chin with a sealed fit, is crucial, as facial hair can compromise the seal, ensuring "all the breathing is through the mask and not around the mask," Dr. Kumar explained. Disposable masks should be replaced when dirty or damaged, and masks are not recommended for children younger than two; individuals with heart or lung disease should seek medical advice.

Dr. Kumar warns that pollution can lead to persistent coughing, airway inflammation, and asthma-like attacks, in addition to increasing risks of pneumonia, heart attacks, and strokes. Prolonged exposure has also been linked to impaired lung development in children and lung cancer. He advises avoiding strenuous outdoor exercise during heavy pollution, particularly in the early mornings when levels can be highest. Indoors, air purifiers with high-efficiency particulate air (HEPA) filters can help by filtering pollutants and recirculating cleaner air. Purifiers should have sufficient capacity for the room, be placed where most time is spent, and run consistently. While HEPA filters trap particles and activated-carbon filters can remove some gases, no purifier eliminates every pollutant, and ozone-producing machines should be avoided. Dr. Kumar notes that cleaner indoor air reduces exposure but cannot eliminate pollution's health risks. Additionally, avoiding indoor pollutants like incense, mosquito coils, and candles is important, as their particles can linger for hours. Shweta Narayan suggests that if one truly wishes to celebrate Diwali, avoiding firecrackers and opting for electric lights can prevent toxic gases and smoke, as collective firework emissions can significantly worsen air quality across entire cities.

What to watch: The effectiveness of public health advisories and long-term mitigation strategies against pervasive winter air pollution.

Editor's note: The draft is a well-structured and accurate summary of the provided text, capturing the key health and safety recommendations.