HealthCooler temperatures and rain needed to wash away Willamette River algae bloomBy Kristian Foden-Vencil (OPB)Aug. 17, 2023 9:54 p.m. Updated: Aug. 18, 2023 12:46 a.m.Health warnings continue for the river from the Ross Island Lagoon to Cathedral Park. 📨 Daily news in your inboxSign up today for OPB’s “First Look” – your daily guide to the most important news and culture stories from around the Northwest.EmailPlease leave this field blankSign up