PORTLAND, Ore. (AP) — The monstrous wildfire burning in Oregon has grown to a third the size of Rhode Island and spreads miles each day, but evacuations and property losses have been minimal compared with much smaller blazes in densely populated areas of California.

The fire's jaw-dropping size contrasted with its relatively small impact on people underscores the vastness of the American West and offers a reminder that Oregon, which is larger than Britain, is still a largely rural state, despite being known mostly for its largest city, Portland.

The 476-square-mile (1,210-square-kilometer) Boo...