Today’s briefing highlights new research revealing that marine heatwaves nearly double the economic damage caused by tropical cyclones. Marine heatwaves—prolonged periods of unusually warm ocean temperatures—have increased in frequency and intensity due to climate change. These extreme ocean warming events exacerbate the impacts of tropical cyclones by weakening coral reefs and marine ecosystems that normally act as natural barriers against storm surges and coastal flooding. The combined effect leads to significantly greater destruction to coastal infrastructure, fisheries, and local economies. Economic assessments show that when marine heatwaves coincide with tropical cyclones, the resulting damage costs are almost twice as high compared to cyclones occurring without these heatwaves. This finding underscores the urgent need for integrated climate adaptation strategies that address both ocean warming and storm resilience. Strengthening coastal defenses, protecting marine ecosystems, and reducing greenhouse gas emissions are critical to mitigating these compounded risks and safeguarding vulnerable coastal communities and industries.

Published on: 2026-04-12 at 00:15:01