In 1993, the Arizona-Mexico Commission and its sister organization, the Comisión Sonora-Arizona, initiated a binational strategic economic planning process to analyze how the two neighboring states could increase their regional competitiveness in the world economy and enhance the overall quality of life for their residents. One of the recommendations of the Strategic Economic Development Vision was to develop a set of indicators as a tool to monitor progress toward the goals of binational economic development. The purpose of the Regional Economic Indicators is to help policy and decision-makers understand and monitor economic changes in the Arizona-Sonora region and to support policies that promote economic transformation, investment and entrepreneurship in the region.

The information presented here highlights the findings of a drought history study in support of the Governor's Drought Task Force activities, such as determining triggers for drought mitigation and response actions, based on observed hydroclimatic and other information. The material is intended to provide the relevant climatology background for non-specialists, and it is presented in a top ten or frequently asked question format. The questions and answers cover the major climate-related aspects of drought including long-term averages, seasonality, interannual and long-term spatial and temporal drought variations, extremes, and causes of climatic variability. The answers to each question include bulleted Quick Answers followed by a concise explanation of more detailed information. Example figures are presented within the text.