; and (2) determine whether updates to that system are required to ensure that the ratings accurately reflect the severity of tornadoes. (b) Update required If the Under Secretary determines under subsection (a) that updates to the tornado rating system are necessary, the Under Secretary shall update the system. 6. Post-storm surveys and assessments (a) In general The Under Secretary shall perform one or more post-storm surveys and assessments following each hazardous weather or water event determined by the Under Secretary to be of sufficient societal importance to warrant a post-event survey and assessment. (b) Coordination The Under Secretary shall coordinate with Federal, State, and local governments, Indian Tribes, private entities, and relevant institutions of higher education when conducting post-storm surveys and assessments under subsection (a) in order to optimize data collection, sharing, and integration. (c) Data availability The Under Secretary shall make the data obtained from each post-storm survey and assessment conducted under subsection (a) available to the public as soon as practicable after conducting the survey and assessment. (d) Improvement The Under Secretary shall— (1) investigate the role of uncrewed aerial systems in data collection during post-storm surveys and assessments conducted under subsection (a); (2) identify gaps in and update tactics and procedures to enhance the efficiency and reliability of data obtained from post-storm surveys and assessments; and (3) increase the number of post-storm community impact studies, including— (A) surveying individual responses; (B) conducting review of the accuracy of prior risk evaluations; (C) evaluating the efficacy of prior mitigation activity