The Great Drought of 1877-78: El Niño's Deadliest Chapter

In the closing decades of the 19th century, before anyone understood what an El Niño was or how far its reach extended, the tropical Pacific delivered a lesson written in human lives. Beginning in 1876, the rains failed — not in one country, but across half the world at once. India, northern China, northeastern Brazil, Egypt, southern Africa, Java: on every continent touched by the monsoons and the tropics, fields turned to dust in the same terrible years.

Historians call it the Great Drought of 1876-78. Climate scientists now recognize it as the fingerprint of one of the strongest El Niño events in the reconstructed record — the event of 1877-78. A 2018 study in the Journal of Climate did not mince words, calling the resulting catastrophe "arguably the worst environmental disaster ever to befall humanity."

Three continents, one drought

In India, the monsoon failures of 1876-78 produced the Great Famine, centred on the Madras Presidency and the Deccan plateau. An estimated 6-10 million people died. In northern China, drought struck hardest in Shanxi province, and the Northern Chinese Famine claimed an estimated 9-13 million lives. In northeastern Brazil, the Grande Seca — the Great Drought — killed around 500,000 people and set off waves of migration from the sertão that reshaped the country.

Add the tolls from Egypt, southern Africa, Java and elsewhere, and the global figures become almost incomprehensible. Estimates range from 30 to 60 million dead, with the Singh et al. 2018 study citing up to 50 million. By some reckonings, roughly 3-4 percent of the entire human population of the time was affected or lost.

And in a grim illustration of El Niño's two-faced character, while three continents burned dry, Peru simultaneously flooded — the same coastal deluges that Paita's fishermen had associated with their Christmas current for centuries.

What the climate records reveal

For over a century, the 1877-78 disaster was primarily the territory of historians. That changed as paleoclimate reconstructions and modern reanalysis allowed scientists to diagnose the event in detail. The 2018 study led by Deepti Singh, published in the Journal of Climate, assembled the fullest picture yet.

The findings were striking. The record-strength El Niño of 1877 did not arrive alone. It was preceded by a strong La Niña in 1875-76 — a cold phase that itself contributed to drying in some regions and primed the Pacific for a violent rebound. And it was amplified by record-warm temperatures in the Indian Ocean, which helped lock in the failure of the Indian monsoon. The combination — cold phase, record warm phase, and an overheated Indian Ocean — produced a global drought of an extent and severity with few parallels in the instrumental era.

The sequence carries an uncomfortable modern echo: a multi-year La Niña giving way to a powerful El Niño amplified by warm surrounding oceans is precisely the shape of several recent events, including 2023-24. The full sequence of major events, from 1877 to the present, is laid out in the full event timeline.

Drought made into famine

Climate set the stage, but it did not act alone. The historian Mike Davis, in his influential book "Late Victorian Holocausts," argued that the death tolls of 1876-78 were as much the product of political economy as of meteorology. Colonial administrations exported grain from famine-stricken India; relief was late, meagre and conditioned on labor; markets moved food away from those who could not pay. Drought was natural; famine on this scale, Davis contended, was made.

That thesis remains debated in its particulars, but its core insight endures in modern disaster science: El Niño creates hazard, and human institutions determine whether hazard becomes catastrophe. The contrast with recent strong events is instructive — the 2015-16 and 2023-24 El Niños brought severe drought to Ethiopia and southern Africa, yet forecasting, early warning and international response held death tolls to a tiny fraction of the Victorian catastrophe.

The disaster that preceded the science

Perhaps the most poignant aspect of 1877-78 is its timing. When the famines struck, the very name "El Niño" had not yet entered scientific literature — that would come with Captain Carrillo's address in Lima in 1892. Gilbert Walker's discovery of the Southern Oscillation lay four decades ahead, born directly of a later Indian famine, and the full understanding of the coupled ocean-atmosphere system, described in the story of Walker and Bjerknes, would wait until 1969.

The tens of millions who died in 1877-78 were casualties of a phenomenon no one could yet name, let alone predict. Their catastrophe stands at the head of El Niño's recorded history as both a benchmark of what the climate system can do and a permanent argument for the science of prediction — a reminder that the stakes of understanding ENSO have never been academic.