This article analyzes the 2025 environmental crisis in Sumatra by examining the interaction between extreme weather and ecological degradation through the lens of environmental security in International Relations and Islamic environmental ethics. Using qualitative content analysis of official meteorological reports, news investigations, and environmental expert commentaries, this study identifies that extreme rainfall triggered by tropical cyclone activity acted only as the initial cause, while structural ecological damage such as deforestation, watershed degradation, and land use conversion significantly amplified the scale of the disaster. The findings show that weakened ecological buffers increased the vulnerability of communities to floods and landslides, transforming the event into a humanitarian and security crisis. From an Islamic perspective, the disaster reflects the consequences of violating the ethical mandate of humankind as stewards (khalifah) responsible for maintaining environmental balance. The study concludes that addressing future disasters requires integrated mitigation: restoring ecosystems, enforcing sustainable land governance, and revitalizing Islamic ecological principles to strengthen societal resilience.Keywords: environmental security; ecological degradation; extreme weather; Islamic perspective; Sumatra 2025
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