During the mid-part of the last decade, when the population growth rate was at its highest, the Phoenix area experienced rapid development and urban sprawl. The result has been an intensification of the Urban Heat Island effect. In this edition of Decades, author Sally Wittlinger discusses this uncomfortable consequence of urbanization.

What do we mean by "shoes waiting to drop?" We mean the trends that are already well under way — but that we can't quite see yet. These trends could overwhelm us if we don't spot them now and aggressively use our knowledge to plot our course for the future. The five "shoes" highlighted in the report are: A Talent Shake Up; Latino Education Dilemma; A Fuzzy Economic Identity; Lost Stewardship; and The Revenue Sieve.