A groundbreaking study reveals that deforestation in Southeast Asia is causing significantly more heat-related deaths compared to other tropical regions, despite losing a smaller total area of forest. Published in *Nature Climate Change*, the research highlights that between 2001 and 2020, Southeast Asia lost approximately 490,000 square kilometers of vegetation, while tropical Central and South America lost around 760,000 square kilometers. However, the higher population density in Southeast Asia has resulted in an annual death toll of 15,680 rural residents due to heat-related complications, far exceeding the 9,890 deaths in Africa and 2,520 in the Americas. The study, led by Carly Reddington from the University of Leeds, attributes this disparity to the combined effects of deforestation and climate change, which have increased regional temperatures by 0.72 degrees Celsius over two decades. Forests play a critical role in cooling the environment by providing shade and releasing water vapor, akin to human sweating. When trees are removed, the loss of these cooling mechanisms leads to localized warming, sometimes surpassing the effects of global climate change. The research underscores the vulnerability of rural and indigenous communities, who often reside near deforested areas and lack access to resources to mitigate heat risks. Reddington emphasizes the urgent need for tropical nations to strengthen forest protection laws, invest in reforestation, and implement heat management solutions, such as shaded workspaces and improved healthcare access. The study also calls for climate finance to prioritize forest conservation and health resilience in tropical regions, where risks are greatest and resources are limited. Experts like Kimberly Fornace from the National University of Singapore and Winston Chow from Singapore Management University stress the importance of localized studies and public awareness to address the growing threat of heat-related mortality.