40 Years After Armero: Remembering Colombia’s Deadliest Natural Disaster

Written on 11/10/2025
Natalia Falah

40 years after the Armero tragedy, Colombia reopens the search for missing children, using the ICBF’s historic ‘Red Book’ to bring hope and closure to families still waiting for answers. More than 500 minors are still missing. Credit: Public Domain

It has been four decades since one of the most devastating natural disasters in Colombian history struck the town of Armero. On November 13, 1985, the eruption of the Nevado del Ruiz volcano (located in the Andes mountains of Colombia) triggered a catastrophic lahar—a violent torrent of mud, water, and debris—that swept through the city, destroying virtually everything in its path. Armero, a once-thriving town in Tolima, was virtually erased from the map, leaving behind a scene of unimaginable devastation.

The eruption and subsequent mudslide claimed the lives of more than 20,000 people and left thousands injured, marking the event as one of the deadliest volcanic disasters of the 20th century. Families were torn apart, entire neighborhoods obliterated, and a nation was left grappling with collective trauma. For many Colombians, the memory of Armero is not just a historical footnote—it is a painful chapter etched into the national consciousness.

The ongoing search: At least 500 Children Still Missing

Even 40 years later, the consequences of the tragedy continue to resonate. Among the unresolved scars are the cases of children who disappeared that day, their fates still unknown. Colombian authorities estimate that at least 500 minors remain missing, leaving countless families in a state of lingering uncertainty and grief.

In a renewed effort to confront this lingering tragedy, the Colombian government has reopened investigations aimed at locating these missing children. The National Institute of Family Welfare (Instituto Colombiano de Bienestar Familiar, ICBF) is at the center of this initiative, reviewing decades-old records and testimonies in the hope of shedding light on what happened to these young victims. Officials have emphasized that no effort will be spared in seeking answers for families who have lived with decades of uncertainty.

A central element of this renewed effort is the “Libro Rojo” (Red Book) of the ICBF, a comprehensive registry of missing and displaced children in Colombia. Created decades ago, the Libro Rojo was designed to document and track cases of minors whose whereabouts were unknown, serving as a vital archive for social workers, law enforcement, and government agencies.

In this new stage of the investigation, the ‘Red Book’ will be an indispensable tool. By providing detailed historical records, including personal information, family connections, and the circumstances surrounding disappearances, it allows authorities to reconstruct events with unprecedented accuracy. It also serves as a bridge between past and present, giving investigators access to insights and leads that may have been overlooked or lost over the years.

Experts believe that the application of modern investigative techniques alongside the Libro Rojo could finally bring closure to families who have waited four decades for answers. The systematic review of these records not only enhances the efficiency of the search but also ensures that each case is treated with the depth, care, and dignity it deserves.

Lessons Learned: Safety, Preparedness, and Memory

Over 20,000 lives were lost when Armero was buried by the Nevado del Ruiz mudslide in 1985. Credit: Dorian Miguel Ospino Caro / CC BY 2.0.

The Armero tragedy revealed critical failures in disaster management and risk awareness. Despite warnings from scientists about the potential for a volcanic eruption, local authorities failed to evacuate residents in time. Communication breakdowns, a lack of emergency planning, and underestimation of the volcano’s power turned what could have been a preventable disaster into a historic catastrophe.

In the aftermath, Colombia faced the enormous challenge of not only rebuilding physically but also confronting the social and psychological impact of such widespread loss. The tragedy prompted a reevaluation of national disaster protocols and led to the creation of more robust systems for monitoring volcanic activity and emergency evacuation plans. Today, Colombia has invested significantly in early warning systems, community training, and risk prevention measures to avoid a repetition of Armero-like devastation.

The ongoing search for missing children also serves as a stark reminder of the human cost of neglecting these responsibilities. It underscores the fact that disasters leave behind invisible wounds—families whose lives have been permanently altered, generations shaped by loss, and a society reminded of the fragility of human life in the face of nature’s forces.

Reopening the past: hope and healing for Colombian families

For many families, the reopening of the search offers a glimmer of hope. While 40 years may seem like an eternity, the effort to identify and account for the missing children represents a moral and emotional imperative. By combining the historical records of the ‘Red Book’ with modern forensic and investigative methods, authorities aim to locate these children or, at the very least, provide families with answers that have long been denied.

Colombian officials emphasize that this process is about more than closure—it is about human dignity. It acknowledges the suffering of those left behind and validates the memory of those who perished, ensuring that they are not forgotten. By revisiting the past with renewed tools and determination, the government hopes to give families the opportunity to finally heal.

Moreover, this initiative resonates beyond the immediate tragedy. It contributes to a culture of accountability and responsibility, signaling to the Colombian public that even decades later, the state can and should act to protect and honor its citizens. It is a message that while natural disasters are unavoidable, negligence in response is not, and lessons learned must translate into action.

Remembering Armero: A call to never forget

Forty years after the eruption of Nevado del Ruiz, Armero remains a symbol of loss, resilience, and the ongoing pursuit of justice. The mudslide that consumed the city altered the course of countless lives, leaving scars that are still felt today. Yet, the reopening of the search for missing children—and the pivotal role of the ICBF’s ‘Red Book’—demonstrates a commitment to human dignity and remembrance.

As Colombia continues to navigate the legacy of this tragedy, the story of Armero reminds the nation—and the world—of the devastating consequences of ignoring early warnings, the importance of preparedness, and the enduring strength of families and communities in the face of unimaginable loss. It is a call to remember, to learn, and to act, ensuring that the lessons of Armero continue to shape Colombia’s approach to disaster response, human rights, and the protection of its most vulnerable citizens.