The Maricopa County medical examiner's office identified him as Kevin Vallesteros. The office has not yet determined his cause and manner of death. Honolulu police said he died Tuesday morning.

Among the 15 counties on our list is Maricopa County, in the southwestern swing state of Arizona. Maricopa County, home to Phoenix, is the politically competitive heart of one of the key ...

New population estimates released by the U.S. Census Bureau revealed that Maricopa ... County (5,009,302). The latest findings come months after the Census Bureau released numbers showing that ...

The number of confirmed heat deaths in Maricopa County was 602 ... 645 in the previous year. The Arizona Republic first reported in October that county officials expected fewer heat fatalities.