Just about every summer in recent years, a stretch of the Willamette River south of downtown Portland at Ross Island turns green from a thick layer of toxin-producing algae that grows rapidly in ...

While things will start to warm up Friday afternoon, the Columbia River Gorge is expected to stay frozen through the ... bring more precipitation to the Willamette Valley by the afternoon commute.

Sewage and stormwater began spilling into the Willamette River around 2:30 on Sunday afternoon, when weekend rains overflowed Portland’s Big Pipe system. The sewage-stormwater mix drained into ...

PORTLAND, Ore. (KOIN) — Local rivers are flush with rainwater after the Willamette Valley was hit with heavy rain Saturday. The Pudding River in Aurora is forecast to reach the action flood ...