The crash occurred around 11 a.m. PT amid whiteout conditions on the westbound lane of Interstate 84 near Multnomah Falls, about 25 miles east of Portland, according to the Multnomah County Sheriff's Office. An SUV caught fire in the collision, but all occupants managed to escape. First responders searched vehicles one by one as reports emerged of injuries and people trapped in their cars, the sheriff's office said.