In Spring 2024, ECOS and the Association of State and Territorial Health Officials (ASTHO) partnered to gather information and share best practices for state and territorial health and environmental agency resiliency planning. ECOS and ASTHO held a series of regional listening sessions to hear from state agencies about how they plan for natural disasters and engage with disadvantaged or vulnerable communities, as well as what challenges they face in their emergency responses. Based on those discussions, ECOS and ASTHO developed this summary to assist health and environmental agencies in their planning process, with an emphasis on resiliency planning in communities with environmental justice concerns.