Hanif Faisol Nurofiq

Stories

Sumatra’s megaflood: cyclone Senyar, deforestation, and a $3.1 billion rebuild

As of May 2026: Has suspended operations of key firms in Batang Toru for environmental audits after the floods

In late November 2025, Cyclone Senyar struck Sumatra, unleashing days of extreme rainfall that triggered catastrophic floods and landslides in Aceh, North Sumatra, and West Sumatra. The disaster killed at least 950 people, left 274 missing, injured thousands, and displaced about a million people—one of Southeast Asia's deadliest recent climate disasters.

Updated May 10

Sumatra’s megafloods expose years of deforestation and corporate risk-taking

Built World

As of May 2026: Confirmed suspension of four companies in Batang Toru watershed; overseeing environmental audits

In late November 2025, Cyclone Senyar dumped extreme rainfall on Sumatra, unleashing floods and landslides across Aceh, North Sumatra, and West Sumatra. By January 4, 2026, authorities reported at least 1,177 deaths, 165 missing, and more than 3.3 million people affected, with around 1.1 million displaced across 52 cities and regencies.

Updated May 10