Learning from past disasters

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Learn from past disasters on the PreventionWeb knowledge base. These collections explore the lessons learned from past disasters, what were the risk drivers, impacts and efforts towards building back better.

Learning from past disasters
Nevado del Ruiz Volcanic Eruption
9 December 2021
The Nevado del Ruiz Volcanic Eruption, also known as the Armero Tragedy, is considered as Colombia’s worst natural hazard-induced disaster which produced the deadliest lahar ever recorded. After 69 years of dormancy, the stratovolcano in Tolima, Colombia erupted in 13 November 1985 melting the mountain’s glaciers and sending lahars down its slopes at 60 kilometers per hour.
16 September 2021

From the zoonotic origin of the disease to its widespread impact in all sectors, the COVID-19 pandemic illustrates the systemic nature of risk, calling for a whole of society approach to mitigate and respond.

Cyclone Gita
9 December 2021
Tropical Cyclone (TC) Gita formed in early February 2018 and developed into a category 4 cyclone, affecting multiple countries in the Pacific region. Tonga was hardest-hit, incurring severe damage.
9 December 2021
Tropical Cyclone Idai made landfall near Beira City, Mozambique on 14 March 2019, bringing strong winds and severe flooding in Mozambique, Malawi, Zimbabwe, and Madagascar. Cyclone Idai was followed one month later by Tropical Cyclone Kenneth, which made landfall in Mozambique as the strongest cyclone to ever hit the African continent.
8 December 2021
The 2015–16 El Niño was one of the strongest El Niño events since 1950, with wide-ranging effects felt around the world.
La Palma volcanic eruption in 2021
7 January 2022
From Haiti to China, a look back at some of the forgotten disasters that struck in 2021.
9 December 2021
The Japan earthquake and tsunami prompted extensive damage, including the nuclear meltdown at the Fukushima Daiichi Nuclear Power Plant.
8 December 2021
In January 2010, a catastrophic earthquake struck Haiti, impacting millions of people and generating multiple aftershocks.