This National Guideline is a comprehensive resource that equips individuals, communities, and healthcare professionals with the information they need to stay safe during hot weather. Especially for healthcare professionals, it reinforces their knowledge and provides direction to manage and mitigate cases and fatalities of heat-related illnesses. It outlines the signs and symptoms of heat-related illnesses, along with effective prevention strategies for different settings, with an emphasis on vulnerable populations. In addition to immediate response plans, this guideline also includes long-term strategies for facility preparedness and capacity building to tackle future health issues related to heat waves.