Climate Change And The Emerging Public Health Crisis In India

Climate change as a health crisis

• Broader impact: Climate change intensifies existing diseases and creates conditions for new health threats
• Neglected dimension: Public discourse focuses more on environment and economy while overlooking health consequences

Water related health risks

• Urban flooding impact: Recurrent waterlogging in cities like Mumbai leads to contamination and spread of cholera typhoid hepatitis A and leptospirosis
• Sanitation stress: Flooding overwhelms urban sanitation systems increasing exposure to infections
• Drought effects: Water scarcity in drought prone regions forces use of unsafe water raising diarrhoeal diseases and dehydration

Expanding disease patterns

• Seasonal shifts: Changing temperature and rainfall patterns prolong disease cycles and allergy seasons
• Geographic spread: Diseases are expanding into new regions with populations lacking immunity
• Vector borne diseases: Rising temperatures increase mosquito populations expanding diseases like dengue and malaria
• Changing dengue trends: Peak shifting from September to November in Delhi NCR due to extended favourable conditions
• Malaria expansion: Spread to cooler regions such as Himachal Pradesh where it was previously minimal

Air pollution and systemic health impacts

• PM2 point 5 exposure: Fine particulate matter penetrates lungs and bloodstream affecting multiple organs
• Respiratory impact: Causes inflammation reduced lung function asthma and COPD
• Cardiovascular effects: Damages blood vessels increases risk of hypertension heart attack and stroke
• Kidney damage: Long term exposure impairs kidney function and contributes to chronic kidney disease

Heat stress and physiological burden

• Energy demand link: Increased use of air conditioning raises emissions and worsens pollution creating a feedback loop
• Cardiovascular strain: Heat stress forces the heart to work harder increasing risk of hypertension heart attack and stroke
• Vulnerable groups: Outdoor workers and populations without adequate shelter face higher exposure and risks
• Heat stroke trends: Rising cases reported in regions such as Odisha Telangana and Vidarbha
• Night time warming: Reduced cooling period in urban areas like Delhi NCR and Mumbai limits physiological recovery

Impact on infant and maternal health

• Birth outcomes: Exposure to extreme heat and air pollution linked to preterm births and low birth weight
• Vulnerability: Infants face heightened risks due to developing immune and physiological systems

Food security and nutrition impacts

• Agricultural disruption: Extreme weather and unseasonal rains reduce crop productivity and stability
• Nutritional decline: Lower food quality and rising prices increase micronutrient deficiencies and malnutrition
• Livestock impact: Heat stress reduces milk production affecting child nutrition
• Immunity effects: Food insecurity weakens immunity increasing susceptibility to diseases especially among children and elderly

Overall public health implications

• Multidimensional crisis: Climate change affects water health air quality disease patterns and nutrition simultaneously
• Preparedness gap: Health systems in newly affected regions remain underprepared
• Urgency of recognition: Treating climate change as a medical emergency is essential for effective response strategy