El Niño's Hidden Health Risks
Climate conversations often focus on melting glaciers, rising temperatures, and changing rainfall patterns. Yet one of the most immediate impacts of climate events is felt much closer to home: inside the human body.
El Niño, a natural climate pattern linked to warmer ocean temperatures in the Pacific, has a ripple effect across the world. In India, it is commonly associated with higher temperatures, prolonged heat, and irregular rainfall. While weather forecasts often highlight these environmental changes, the health consequences receive far less attention.
The reality is that climate and health are deeply connected. When temperatures soar and rainfall patterns become unpredictable, the risk of heat-related illnesses, infectious diseases, and complications from existing medical conditions rises significantly. Understanding these risks is not about creating fear. It is about helping people prepare and protect themselves.
When Heat Stops Being Uncomfortable and Starts Becoming Dangerous
One of the most noticeable consequences of El Niño is prolonged and intense heat. Many people associate hot weather with discomfort, but extreme heat can quickly become a medical emergency. The body relies on sweating and blood circulation to regulate temperature. During periods of excessive heat, these cooling mechanisms can become overwhelmed.
According to Dr. Shankar Kumar Gupta, Consultant- General Surgery, ISIC Multispeciality Hospital, "El Niño years can also bring extreme heat with them that may lead to dehydration, heat exhaustion, heat stroke, or exacerbate underlying health issues like heart disease, respiratory illness, or diabetes. Children, older people, pregnant women and those who work outdoors are especially susceptible."
Heat exhaustion can cause dizziness, weakness, nausea, headaches, and excessive sweating. If left untreated, it can progress to heat stroke, a life-threatening condition in which the body's temperature rises dangerously high.
The risk is especially concerning for outdoor workers, traffic personnel, delivery workers, construction labourers, and farmers who spend long hours exposed to direct sunlight.
The Indian government has repeatedly highlighted the dangers of heatwaves through advisories issued by the National Disaster Management Authority (NDMA). NDMA's Heat Wave Guidelines emphasise hydration, avoiding peak afternoon heat, and recognising early warning signs of heat-related illnesses.
Increased Spread of Infectious Diseases
El Niño also disrupts rainfall patterns, leading to both droughts and floods. Stagnant water from heavy rains creates ideal breeding grounds for mosquitoes, increasing the risk of vector-borne diseases such as dengue, malaria, and chikungunya. Additionally, contaminated water sources during floods can lead to outbreaks of waterborne diseases like cholera and typhoid.
Health systems in vulnerable regions may become overwhelmed during such events, making preparedness crucial. Communities are advised to store clean water, use mosquito repellents, and seek medical help at the first sign of illness.
Impact on Mental Health
Beyond physical health, El Niño can also affect mental well-being. Prolonged heat, crop failures, and economic stress can lead to anxiety, depression, and other mental health issues. Farmers facing crop loss due to erratic weather are particularly at risk. It is important to acknowledge these psychological impacts and provide support through community networks and professional help.
Who Is Most at Risk?
- Children and elderly people
- Pregnant women
- Outdoor workers (construction, agriculture, delivery)
- People with pre-existing health conditions (heart disease, diabetes, respiratory illness)
- Low-income communities with limited access to cooling and healthcare
How to Stay Safe During El Niño
- Stay hydrated by drinking plenty of water, even if not thirsty.
- Avoid outdoor activities during peak heat hours (11 a.m. to 4 p.m.).
- Wear light, loose-fitting clothing and use sunscreen.
- Keep living spaces cool with fans, shades, or air conditioning.
- Check on vulnerable neighbours and family members.
- Store emergency supplies of water and food in case of floods.
- Follow local health advisories and seek medical help if symptoms of heat illness appear.
By understanding these hidden health risks, individuals and communities can take proactive steps to reduce harm. El Niño is a natural phenomenon, but its worst effects can be mitigated with awareness and preparation.
