This bill aims to significantly reduce health risks associated with extreme heat by establishing two key entities. It creates the National Integrated Heat Health Information System (NIHHIS) within the National Oceanic and Atmospheric Administration (NOAA) to improve the delivery of heat-related data, forecasts, and science-based solutions. Concurrently, it establishes the National Integrated Heat Health Information System Interagency Committee within NOAA to coordinate a unified Federal approach to heat-related challenges, ensuring a comprehensive response. The Committee is tasked with developing a 5-year strategic plan to enhance interagency coordination, data collection, research, and financing mechanisms for heat planning and preparedness. This plan will guide efforts in communication, service delivery, and workforce development across various Federal agencies. NIHHIS will specifically focus on improving the availability of heat-related information and supporting a dedicated research program on heat health. To fund these initiatives, the bill authorizes an appropriation of $5,000,000 annually for fiscal years 2025 through 2029.