Dry, windy conditions in the summer of 1988 brought dozens of smaller, individual fires into one massive blaze. Thousands of firefighters were brought in, but the fire burned more than 790,000 acres before it was subdued by cool and wet weather. Outside the park, two people died as a result of the fire.
However, despite the frightening scale of the fire and the massive response -- which came at a cost of about $120 million -- long-term impacts on the park were largely cosmetic. Most plant and animal species were largely unaffected or quickly rebounded.