(Portland, OR) -- With another stretch of 90-degree heat expected Friday and Saturday, Multnomah County officials are urging residents, especially older adults living alone, to prepare now. Emergency managers say people without air conditioning or with health conditions face the greatest risk during prolonged heat. Cooling centers, including the Gresham Senior Center, are offering relief and activities for those seeking a safe space. Officials say two people in the county have already died from heat-related causes this year and hope early warnings will prevent more tragedies.