The Tribal Climate Health Assurance Act of 2025 mandates the Secretary of Health and Human Services, acting through the Director of the Centers for Disease Control and Prevention (CDC) and in coordination with the National Indian Health Board, to implement the Climate Ready Tribes Initiative . This initiative is designed to bolster the capacity of Tribal governments, health departments, and communities to address the public health impacts of climate change. Key objectives of the initiative include translating climate change science, developing decision-support tools, and serving as a credible leader in planning and preparing for climate-related health threats. It also focuses on identifying, assessing, and mitigating these threats, while sharing vital resources and funding opportunities with Tribal entities. To support these efforts, the bill authorizes an appropriation of $110,000,000 for fiscal year 2026 and each subsequent fiscal year, with a strict limitation preventing the transfer or reprogramming of these funds for other programs.