Three people have died from causes linked to Chicago's recent heat wave, according to records from the Cook County Medical Examiner's Office. David Gonzalez, 44, died from heat stroke complicated by hypertension, diabetes and obesity. The medical examiner also said autopsies showed that two other deaths reported on July 4 were related to the heat. The autopsy for Mike Rodriguez, 57, showed that he died as a result of hypertensive and atherosclerotic cardiovascular disease as the primary cause,