Multnomah County officials shared the results of a heat map that covers some 400 square miles across the tri-county area. Read more: https://www.kgw.com/article/tech/science/climate-change/portland-metro-heat-island-map-multnomah-washington-clackamas-county/283-3683b907-b7a1-40ef-b22c-d3bcb6f01619 Subscribe: null Watch the latest KGW newscast: https://www.kgw.com/watch Get the KGW app: https://kgw.com/appredirect