Oregon's historic heatwave caused camp evacuations in the Cascades The historic, record-setting heat melted snow in the Cascades that washed out a road and called for a campsite evacuation on Sunday. Author: KGW Staff Updated: 7:36 PM PDT June 28, 2021 MT HOOD, Ore. — Oregon has seen historic record-breaking heat across the state and the Cascades were not an exception. The heat melted the snow off the mountain so quickly over the last couple of triple-digit heat days that it flooded a road near Laurance Lake Campground and the trailhead that campers had to be evacuated. Heather Ibsen with the Mount Hood National Forest said in an email: