Thanks to the 2009 Vital Statistics report, we also know that AZ residents went to the ER more than 1.8 million times.  The top reasons (about 25%) for those visits were abdominal pain, acute upper respiratory infection, chest pain, cuts, mental disorders, and spinal disorders.  More than 1,300 Arizonans were treated in an emergency room for exposure to excessive natural heat, more than 2/3 of them male- and 338 were hospitalized as inpatients for the heat related illnesses.