 A fourth Multnomah County resident has died from apparent heat-related causes. The medical examiner reports the 67-year-old woman was found on Monday in northeast Portland. The first Portland death was reported on Friday and two others died on Sunday. On Saturday, a 33-year-old Clackamas County man was taken to a Portland hospital where he died, bringing the total number of deaths to five. It can take months for the investigation to determine whether these deaths were caused by the heat.