El Niño and India's Coastal Vulnerability: Assessing the Legal Framework for Climate Resilience and Sustainable Development

INTRODUCTION

Climate change is no longer only an environmental concern. It has become a legal, economic and social issue. India is particularly vulnerable because it has a long coastline and millions of people depend on coastal resources, fisheries, ports, shipping and marine ecosystems.

One climate phenomenon which can influence India is El Niño. It is a natural climate phenomenon involving unusual warming of sea-surface temperatures in the central and eastern tropical Pacific Ocean¹. El Niño is not the same as climate change, but it can influence rainfall, temperature and ocean conditions in different parts of the world. When such climate variability interacts with rising temperatures, coastal development and environmental degradation, its effects may become more serious.

The history of India provides an important warning. The 1877-78 El Niño occurred during a period of severe drought and famine in India². The later 2015-16 El Niño coincided with the devastating Chennai floods. In 2026, India has scientific institutions capable of monitoring El Niño and issuing warnings to maritime sectors.

This creates an important legal question: If climate risks can now be identified in advance, does India's legal framework provide sufficient protection for coastal communities, marine ecosystems and infrastructure?

This article argues that India has a strong environmental legal framework through the Constitution, environmental legislation, judicial principles and international law. However, the major weakness is the lack of an integrated framework connecting scientific climate warnings with coastal planning, disaster preparedness and maritime governance.

UNDERSTANDING EL NIÑO AND INDIA'S VULNERABILITY

El Niño forms part of the El Niño-Southern Oscillation (ENSO) system. Although it originates in the tropical Pacific, its effects can be felt far away through changes in atmospheric circulation.

Its effect on India is not always the same. It is therefore incorrect to say that every El Niño automatically causes drought or floods in India. Other factors, including Indian Ocean temperatures, atmospheric circulation and local weather systems, influence the final outcome.

This is important for legal analysis because climate-related decisions should be based on scientific evidence rather than assuming that one climate phenomenon is responsible for every disaster.

1877-78 EL NIÑO: THE HISTORICAL LESSON

The 1877-78 El Niño is important for understanding India's historical climate vulnerability. During 1876-78, a severe famine affected large parts of southern, western and central India. Historical estimates indicate that approximately 58.5 million people were within the population affected by the famine, while modern demographic research has estimated approximately 8.2 million excess deaths³.

These figures must be used carefully. It would be incorrect to state that El Niño alone affected 58.5 million people or directly caused 8.2 million deaths. The famine resulted from a combination of drought, crop failure, economic conditions, food distribution problems and political factors⁴. El Niño was an important climate factor but not the only cause.

The importance of 1877 is therefore the relationship between climate variability and human vulnerability. Communities dependent heavily on agriculture and without modern forecasting or disaster-preparedness systems were much more exposed.

The situation today is different. India has satellites, climate models, ocean monitoring and early-warning institutions. Therefore, the legal responsibility has also changed. When risks can be identified before they become disasters, the State must take reasonable preventive measures.

2015-16 EL NIÑO: A MODERN INDIAN EXAMPLE

The 2015-16 El Niño provides a useful modern example. During November and December 2015, Chennai and other parts of Tamil Nadu experienced exceptionally heavy rainfall and severe flooding⁵. More than 1.8 million people were affected by the Chennai floods according to one scientific study⁶.

The event coincided with one of the strongest El Niño episodes of the period. However, scientific research does not support the simple statement that "El Niño caused the Chennai floods".

A Journal of Climate study found that neither El Niño nor La Niña alone increased the probability of an extreme Chennai flood⁷. Warm Bay of Bengal conditions and suitable atmospheric systems were also important. Another study found that natural atmospheric variability and rapid urbanisation both contributed to the scale of the disaster.

This distinction is legally important. If climate-related disasters become worse because of poor drainage, destruction of wetlands or unplanned development, then climate resilience cannot depend only on weather forecasting. It also requires environmental regulation, proper land-use planning and protection of natural coastal systems. The 2015 experience therefore connects climate science with environmental law.

2026 EL NIÑO: FROM WARNING TO LEGAL RESPONSIBILITY

The historical experience of 1877 and the modern experience of 2015 are particularly relevant in 2026 because India now has considerably better scientific capacity.

The Indian National Centre for Ocean Information Services (INCOIS) provides ocean information relevant to fisheries and maritime activities⁸. Its specialised El Niño advisories are particularly important because changes in sea-surface temperatures can influence marine ecosystems, fisheries and coastal conditions⁹.

However, it would be scientifically unsafe to predict that the 2026 El Niño will affect a particular number of people. There is no reliable basis for giving such a figure in advance.

The legal question should instead be:

What should the government and other authorities do when scientific institutions identify foreseeable climate and marine risks?

For coastal India, this may involve preparing fishing communities, improving coastal infrastructure, protecting marine ecosystems, strengthening port resilience and using climate information in development decisions. This is where the precautionary principle becomes important.

INDIA'S CONSTITUTIONAL FRAMEWORK

India does not currently have one comprehensive climate-change statute. Climate protection is addressed through constitutional provisions, environmental legislation, policies and judicial decisions.

Article 21 of the Constitution protects the right to life and has been interpreted by the Supreme Court to include environmental protection¹⁰.

Article 48A directs the State to protect and improve the environment and safeguard forests and wildlife¹¹.

Article 51A(g) imposes a fundamental duty on citizens to protect and improve the natural environment¹².

The Supreme Court's decision in M.K. Ranjitsinh v. Union of India, 2024 INSC 280, is particularly important¹³. The Court recognised that people have a right against the adverse effects of climate change, linked to Articles 14 and 21. It also observed that India has numerous laws and policies addressing environmental and climate concerns but does not have one single umbrella climate statute.

This development is significant for coastal communities. Climate impacts can affect health, livelihood, food security, housing and equality. Therefore, climate resilience is not merely a policy objective; it can have constitutional dimensions.

STATUTORY ENVIRONMENTAL FRAMEWORK

The Environment (Protection) Act, 1986 is one of India's principal environmental statutes¹⁴. Section 3 gives the Central Government broad powers to take measures for protecting and improving the environment, including coordination between authorities and restricting activities that may harm environmentally sensitive areas.

The National Green Tribunal Act, 2010 provides a specialised mechanism for environmental disputes and compensation. Importantly, Section 20 requires the Tribunal to apply the principles of sustainable development, precautionary principle and polluter pays principle¹⁵.

The Coastal Regulation Zone (CRZ) framework is also relevant because India's coastal areas contain fragile ecosystems and densely populated settlements. Coastal development must therefore balance economic activity with environmental protection¹⁶.

These laws provide useful legal tools. However, they do not operate as one complete climate-resilience framework.

JUDICIAL PRINCIPLES AND CLIMATE RESILIENCE

Indian environmental jurisprudence has developed principles which are highly relevant to climate-related risks.

In Vellore Citizens' Welfare Forum v. Union of India, (1996) 5 SCC 647, the Supreme Court recognised sustainable development, precautionary principle and polluter pays principle as important principles of Indian environmental law. The Court explained that where there is a threat of serious environmental damage, lack of complete scientific certainty should not become a reason for postponing preventive measures. This principle has direct relevance to El Niño. Suppose scientific authorities identify increased marine heat stress or possible coastal flooding. Authorities should not necessarily wait until actual damage occurs before acting.¹⁷

In M.C. Mehta v. Kamal Nath, (1997) 1 SCC 388, the Supreme Court developed the Public Trust Doctrine, recognising that natural resources are held by the State for the benefit of the public. Coastal ecosystems, wetlands and marine resources should therefore not be viewed only as resources for economic development. The principle of sustainable development requires a balance between development and environmental protection rather than choosing one completely over the other.¹⁸

THE MARITIME LAW DIMENSION

India's climate resilience also has an important maritime-law component.

The United Nations Convention on the Law of the Sea, 1982 (UNCLOS) is particularly relevant. Article 192 provides that States have an obligation to protect and preserve the marine environment. Article 194 requires States to take measures to prevent, reduce and control pollution of the marine environment. El Niño itself is not marine pollution. However, climate-related changes can place additional stress on marine ecosystems¹⁹.

For India, this matters because fisheries, ports, shipping and coastal communities are connected with the health of the marine environment. Therefore, climate resilience should not be treated only as an environmental issue. It should also be considered within maritime governance and coastal development.

THE LEGAL GAP

The major problem is not that India has no environmental laws.

India has:

• constitutional environmental protection
• The Environment (Protection) Act, 1986
• The National Green Tribunal Act, 2010
• The CRZ framework
• Disaster-management institutions
• Climate policies
• Scientific institutions such as INCOIS.

The problem is that these systems are fragmented. For example, if INCOIS issues a warning about unusual ocean temperatures, it raises several questions. Who must act? Should fisheries authorities warn fishing communities? Should coastal authorities reassess vulnerable infrastructure? Should ports change their preparedness measures? Should sensitive ecosystems receive additional protection?

Existing laws provide parts of the answer, but responsibility is divided among different authorities. This creates a gap between scientific knowledge and legal action. The lesson from 1877 is that vulnerability can turn climate variability into a humanitarian disaster. The lesson from 2015 is that environmental degradation and urbanisation can increase the impact of extreme events. The lesson for 2026 is that India now has information in advance and therefore has a greater opportunity to prepare.

THE WAY FORWARD

First, India should strengthen its climate governance by creating clearer legal responsibilities for climate adaptation and resilience.

Second, climate-risk assessment should become an important part of coastal infrastructure and port development. Major projects should consider flooding, erosion, extreme rainfall and changing ocean conditions.

Third, scientific warnings from institutions such as INCOIS²⁰ and IMD²¹ should be systematically connected with administrative decisions. Warnings are useful only when they reach the people who need them.

Fourth, mangroves, wetlands and other natural coastal barriers should receive stronger protection. These ecosystems are not obstacles to development; they can themselves act as natural climate-resilience infrastructure.

Fifth, vulnerable fishing and coastal communities should be included in climate planning. Adaptation should protect not only buildings and ports but also livelihoods.

Finally, sustainable development must include long-term climate risk. Development which produces immediate economic benefits but increases future coastal vulnerability cannot properly be called sustainable.

CONCLUSION

El Niño provides an important way to understand the relationship between climate variability, vulnerability and law. The 1877-78 experience shows how climate variability, when combined with social and economic vulnerability, can produce enormous human suffering. The 2015-16 event shows how extreme weather can interact with urbanisation, environmental degradation and coastal conditions. The emerging 2026 challenge is different because India now has scientific institutions capable of providing advance information. The legal question is therefore no longer simply whether climate risks exist. It is whether the legal system is capable of turning scientific warnings into preventive action.

India already possesses strong environmental principles. Articles 14 and 21 provide constitutional protection; Article 48A directs the State towards environmental protection; the Environment (Protection) Act provides regulatory powers; the NGT Act incorporates sustainable development and precautionary principles; and UNCLOS establishes obligations concerning the marine environment. Indian courts have also developed a substantial body of environmental jurisprudence.

However, the absence of an integrated climate-resilience framework and the fragmentation between scientific, environmental, disaster-management and maritime institutions remain significant challenges. The answer is therefore not to stop development. It is to make development climate-resilient, scientifically informed and environmentally responsible.

The history of 1877 cannot be changed. The consequences of 2015 cannot be undone. But the knowledge available in 2026 provides an opportunity to prepare before the next disaster. Sustainable development should not merely ask how much India can develop today. It should also ask whether that development will leave India's coastal communities, oceans and future generations safer tomorrow.