Impact of Climate Change on Respiratory Health: Understanding Prolonged Coughs

The Growing Concern of Persistent Coughs

Many individuals are experiencing a persistent cough that lingers even after recovering from a cold or viral infection. Pulmonologists and respiratory experts attribute this trend to climate change, deteriorating air quality, and extended allergy seasons, which are altering the behavior of respiratory illnesses and complicating recovery. Factors such as rising temperatures, prolonged heatwaves, and unpredictable rainfall are creating an environment conducive to airway inflammation, allergies, and respiratory infections. Experts emphasize that climate change is evolving into a significant public health issue.

Effects of Climate Change on Lung Health

How Climate Change is Affecting Respiratory Health

Dr. Arjun P, a Senior Consultant in Pulmonology at KIMS Health, notes that India's shifting weather patterns are exacerbating respiratory diseases. "India ranks among the countries with the poorest air quality. In winter, cities like Delhi face severe smog, while urban areas contend with vehicle emissions, industrial pollution, and dust. Increased temperatures also lead to higher levels of ground-level ozone, a pollutant that irritates airways and can cause chronic coughs, particularly in asthma patients," he explains. Elevated temperatures contribute to the formation of ground-level ozone, which can aggravate asthma symptoms and breathing difficulties in individuals with chronic obstructive pulmonary disease (COPD).

Why Coughs May Persist

Why May Your Cough Last Longer?

Climate change is leading to more frequent heatwaves, dust storms, and wildfires in various regions. These events release tiny pollutants like PM2.5, which can penetrate deep into the lungs. Inhalation of these particles can cause inflammation, resulting in prolonged coughing, wheezing, chest tightness, and breathlessness long after an infection has resolved. Warmer air retains more allergens and pollutants, while erratic weather patterns create favorable conditions for viruses and irritants to linger. "With weather patterns fluctuating from hot to humid or rainy, the airways are repeatedly exposed to environmental triggers, delaying recovery and prolonging respiratory symptoms," states Dr. Nirmal Mathew Alex, an Associate Consultant in Internal Medicine at Apollo Adlux Hospital. He adds that extended pollen seasons due to climate change mean that allergy-related cough symptoms can persist for months, often coinciding with viral infections.

Extended Allergy Seasons and Their Impact

Longer Allergy Seasons Mean Longer Coughs

Shifts in rainfall patterns and rising temperatures are lengthening pollen seasons across many regions of India. Additionally, monsoon rains and flooding create damp indoor environments that foster mold growth. High humidity levels also encourage dust mites, another common allergen. These allergens can keep airways inflamed, leading to allergy-related coughs that may extend beyond a single season, persisting for weeks or even months and overlapping with viral infections.

The Importance of Indoor Air Quality

Indoor Air Can Be Just as Harmful

Experts emphasize the significance of indoor air quality. Dr. Pragathi Rao, a Consultant in Respiratory Medicine at Ramaiah Memorial Hospital, points out that many individuals close their windows during high pollution or unpredictable weather, which can trap indoor pollutants like cooking fumes, dust, and mold spores. "Poor ventilation allows these irritants to accumulate, raising the risk of chronic cough and respiratory issues, particularly among children, the elderly, and those with asthma or allergies," she explains. Vulnerable groups include children, older adults, smokers, and individuals with asthma or COPD. For instance, Yash Pal, a 75-year-old from New Delhi, developed severe asthma after experiencing persistent wheezing and breathlessness. "My doctors indicated that worsening pollution and changing weather have significantly worsened my condition and advised me to leave the city, but where can I go?" he lamented. Alarmingly, around 91% of urban residents breathe air that exceeds safe limits set by the World Health Organization. Globally, air pollution is responsible for approximately 4.2 million premature deaths annually and leads millions to seek emergency care for asthma, bronchitis, and lung infections.

Protecting Your Lung Health

How to Protect Your Lungs

Respiratory specialists recommend several practical measures to minimize exposure and safeguard lung health:

• Check the daily Air Quality Index (AQI) before heading outdoors.


• Avoid outdoor activities on days with high pollution levels.


• Wear a well-fitted N95 mask during severe pollution or dust storms.


• Maintain clean, dry, and well-ventilated homes to prevent mold growth.


• Stay hydrated to soothe irritated airways.


• Consider steam inhalation if advised by your doctor.


• Avoid self-medicating with cough syrups for prolonged symptoms.

A cough lasting more than three weeks should not be ignored, especially if accompanied by fever, breathlessness, chest pain, unexplained weight loss, or coughing up blood. "These symptoms may indicate underlying conditions such as post-viral airway inflammation, allergic bronchitis, asthma, pneumonia, or other lung diseases that require medical evaluation," warns Dr. Arjun.

Climate change is not only reshaping the environment but also altering the dynamics of respiratory illnesses. Increasing temperatures, deteriorating air quality, extended pollen seasons, and rising humidity are creating conditions that keep airways inflamed for longer, leading to more frequent persistent coughs. Experts stress the importance of monitoring air quality, minimizing exposure to pollutants, and seeking timely medical attention for lingering symptoms to protect respiratory health in an increasingly unpredictable climate.