In a desert city such as Phoenix, summertime heat is a way of life, but how much does the built environment contribute to the intensity of the heat on a summer night? In urbanized Phoenix, nights don’t cool down as much as in the surrounding rural areas and on more and more summer nights, the official Phoenix temperature fails to drop below 90 degrees. Climate plays a huge role in the comfort and quality of life of residents, with numerous implications for tourism, energy demand, water use, and the vulnerability of low-income families.

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.

This study was conducted as a progress evaluation of charter schools in Arizona. The study was funded by the Arizona Department of Education and conducted during calendar year 1998 by the Morrison Institute for Public Policy.

A total of 303 parents of charter school students, 171 students, 123 teachers and 54 directors completed surveys about charter schools. Fourteen focus groups were held around the state with parents, students, teachers and directors. Individual interviews were conducted with 23 persons, most of whom either hold policy-making positions related to charter schools or are employed by professional organizations that interact frequently with the schools.