Cowlitz River below Mayfield Dam also remains under flood warnings on Tuesday, “until further notice,” as the river flow has risen above 25,000 cfs—the flood stage threshold. Flooding is expected from Mayfield Dam downstream through Toledo, covering farmlands and roads, mainly near Toledo, as flows stay near 29,000 cfs through Wednesday.

While flooding may not reach the historic levels seen last week, a KIRO 7 meteorologist said the overall impacts could actually be worse.

After last week's record river flooding in Washington state, more atmospheric rivers are taking aim at the West this, set to bring heavy rain, mountain snow to Oregon and California, too.

(THE CONVERSATION) Along the U.S. West Coast, atmospheric rivers are dreaded for the damage they can cause, but they are also essential to the region’s snowpack and water supply, as Qian Cao, a hydrologist at the University of California, San Diego, explains.

What is it about mid-December weather? The latest atmospheric river has brought warm, heavy rain, resulting in widespread major flooding and landslides.

Record river flooding is ongoing in parts of Washington State, but following a drier weekend, a new worry for wetter weather will arise early in the week ahead.

Lots of sun, along with periodic high clouds, and temperatures from the mid 60s to the low 70s are still in that forecast for the Kern River Valley, Desert and Kern County mountains this week. Breeziness will become more common by mid to late week as pressure gradients tighten but all-in-all these areas have the easier forecast.

Two landslides have triggered evacuation warnings for some neighborhoods. Now with more rain in the forecast, the situation could get worse.