Standard Community Assessment for Public Health Emergency Response (CASPER) methods, a type of rapid needs assessment (RNA) for collecting data on household needs and impacts following emergencies, are not always suitable for rural, destroyed, or severely damaged communities, or disasters affecting small geographical areas. The objectives of this modified RNA were to: (1) identify the strengths, limitations, and operational challenges for utilization of modified RNAs for post-disaster, quick response research; and (2) capture the acute mental and physical health impacts and lived experiences of communities affected by the 2024 Arbor Day tornado in Nebraska (USA). This field study tested modifications of the CASPER methodology in rural and inaccessible communities in Washington and Douglas County, Nebraska following the 2024 Arbor Day tornado. A 60-item survey was developed using validated questions, including on mental and physical health impacts. Survey completion rates for Washington and Douglas Counties were 57.3% and 89.3%, respectively. Exacerbation of existing conditions, worsening allergies, and stress were commonly reported following the tornado. Modified RNAs were useful and feasible approaches for capturing perishable data following the 2024 Arbor Day tornado outbreak. These findings can be used to inform not only public health response but also future planning and policy.