Snow and ice in whiteout conditions contributed to a pileup of more than 100 cars on a major highway connecting Oregon and Idaho, reportedly injuring several people, as a winter storm descended on the Pacific Northwest Thursday.

The high risk of mudslides prompted evacuation orders Thursday for some Los Angeles neighborhoods ravaged by recent wildfires, while snow and ice to the north caused a more than 100-car pileup on a major highway connecting Oregon and Idaho,