BueaThird lahar in six years flooded the city on April 2.
Lahars form when rain washes loose volcanic debris off Mount Fako’s slopes after prolonged dry periods, a cycle worsened by climate change.
Cameroon’s Anglophone Southwest, under active separatist conflict, has designated no flood management authority.
Sources: Global Voices
WHAT A LAHAR IS
A lahar is a volcanic mudflow — a slurry of ash, rock, and water moving with the consistency of wet concrete. It can travel 60 km/h down a valley and entomb everything in its path. The word is Javanese; Indonesian volcanologists named the phenomenon long before Western geology had a term for it.
THE ARMERO PRECEDENT
In 1985, a small eruption of Colombia's Nevado del Ruiz melted summit ice and sent lahars down sleeping valleys. The town of Armero — 50 km away, untouched by lava or ash — was buried in mud. 23,000 people died. It remains the textbook case for why volcanic risk extends far beyond the visible cone.
MOUNT FAKO
Mount Cameroon, called Mount Fako locally, is West Africa's most active volcano — eruptions roughly every 20 years through the 20th century. At 4,040 m it rises directly from the Atlantic coast, with Buea sitting on its southeastern flank at around 1,000 m elevation. The slope above the city is steep, deforested, and loaded with ash from the 1999 and 2000 eruptions.
THE ANGLOPHONE QUESTION
Cameroon's Northwest and Southwest regions were British-administered after WWI; the rest of the country was French. At independence the Anglophone south voted to join the Francophone republic in 1961. Marginalization of English-speakers in courts and schools triggered a separatist insurgency — Ambazonia — that has run since 2017, displacing roughly a million people and gutting local administration.
WHY GOVERNANCE MATTERS FOR LAHARS
Lahar mitigation is mundane civil engineering: drainage channels, debris basins, slope monitoring, evacuation sirens, building codes that keep settlements out of obvious runout paths. All of it requires a functioning local authority. A region whose schools have been closed for years and whose civil servants commute under militia checkpoints does not run a flood-management agency.
THE DRY-SEASON PARADOX
Buea's lahars do not strike at peak rainfall. They strike when prolonged dry spells bake loose ash into a brittle crust, then a sudden downpour mobilizes it all at once. Climate change is lengthening dry periods and intensifying single-day rainfall — the exact two ingredients lahar formation needs.