The operational efficiency of an urban emergency response plan (UERP) is proportional to the magnitude of a rigorous assessment process. The core objective of the assessment process is to identify possible deficiencies, in particular, micro-deficiencies existing within the emergency plans. Most of the existing approaches rely on multi-criteria and emergency state for assessments. However, identification of micro-deficiencies requires developing a comprehensive microscopic model of the entire emergency system and simulating an emergency plan under various scenarios. Here, an assessment framework is proposed based on agent-based modeling and geosimulation and considering the urban features for general and microscopic assessment of urban emergency response plans. To enrich our claim, this framework is applied to assess the futuristic emergency infrastructure plan of upgrading overhead water tanks (OWT) to be used for recharging fire emergency vehicles in case of fire incidents to improve fire suppression time by the Fire Department of Allahabad City, an urban city of India.