“Knowing how a community’s population changes during the day is crucial to emergency preparedness officials and other local planners. This report and series of tables show the population totals for places, minor civil divisions, counties and states, accounting for the flow of commuters on a typical workday. In addition, graphs are available that show cities among the top 20 with the largest commuter-adjusted populations and cities among the top 20 with the greatest percentage change between residence population and commuter-adjusted population. This report also provides maps and ratios of workers to residents for counties and cities.”