The "Godzilla atmospheric river" system may bring major flooding, landslide dangers, and a month's worth of rain compressed into just days.

The wording and definition were changed and refined a bit as atmospheric scientists at MIT studied these storms in the 1970s.

Portions of western Washington state have experienced a month’s worth of rain within the past few days, causing historic flooding, damaging mudslides and more than 100,00 people facing potential evacuations.

Western Washington will finally see some drier weather after catastrophic flooding in some spots this week.

Waterways crested at record levels in several flooded small towns across Western Washington overnight, swamping roads and bridges and forcing people near the Canadian border to scramble into attics and onto rooftops to await helicopter rescue.

Authorities are going door-to-door in South Prairie, Washington, in Pierce County, urging residents to leave their homes immediately as water rises there. The Pierce County Sheriff’s Office previously said that at least 25 people have been rescued in the county since Wednesday, including in South Prairie.

Washington declares emergency as an atmospheric river brings severe flooding, mudslides, road closures and mass evacuations across the state.