Sri Lanka & Malacca: Warming Fuels Extreme Rainfall

Devastating floods and landslides across South and Southeast Asia in November have killed more than 2,230 people, with rising global temperatures exacerbating the intensity of rainfall in the region. The disasters impacted Indonesia, Sri Lanka, Thailand, and Malaysia, highlighting the urgent need for improved disaster preparedness and climate adaptation measures.

Increased Rainfall Linked to Climate Change

Extreme rainfall in the Malacca Strait region – bordering Indonesia, Malaysia, and Singapore – has increased by 9% to 50% due to rising global temperatures. Sri Lanka has experienced even more significant increases, with heavy five-day precipitation events now 28% to 160% more intense compared to historical averages, as seen during Cyclonic Storm Ditwah.

Cyclone Ditwah in Sri Lanka resulted in 639 deaths, with 203 people still missing and over 2.3 million affected, according to reports. On Indonesia’s Sumatra island, floods and landslides intensified by Cyclonic Storm Senyar killed 990 people, with 222 remaining missing as of Thursday.

The United Nations has announced a $35.3 million emergency assistance plan for communities in Sri Lanka impacted by Cyclone Ditwah. The program aims to reach 658,000 vulnerable people between December 2025 and April 2026.

Challenges in Disaster Response

Despite early warnings, failures in ICT infrastructure prevented alerts from reaching many communities. Even when warnings were received, residents struggled to fully grasp the potential scale of the flooding. Language barriers, timing issues, and the remoteness of affected areas further complicated relief efforts.

Scientists emphasize that global warming is amplifying extreme weather patterns and increasing rainfall intensity in regions already susceptible to flooding. Rescue teams and volunteers continue to assist millions affected by the ongoing climate-fuelled disaster, with the official death toll exceeding 1,750 across the worst-affected countries.