After years of living in Yosemite National Park, I learned that, contrary to the teachings of Smokey Bear, fire can be a welcome force for good. It rejuvenates the forest. It clears the way for richer, more diverse habitat. It is essential in the life cycle of the giant sequoia. And if you live in the mountains, surrounded by forests piled high with tinderbox-dry debris, nothing helps you sleep more soundly at night than being in an area that's been burned.
What isn't good is a fire like the Rim fire, which as of Tuesday, had burned 254,685 acres in and around Yosemite. Fueled by dense thickets of pine needles, undergrowth and fallen trees, fires like this one do not move slowly along the ground, clearing the underbrush but leaving parts of the forest intact.
Instead, the flames leap through the crowns of trees, creating infernos that are hard to suppress and denude wide swaths of forest floor, making the terrain more susceptible to erosion by winter snow and rain. Even the mighty sequoias, able to withstand most fires and even thrive because of them, are threatened by a crown fire's staggering heat.
It doesn't have to be this way. For thousands of years the Indians who made Yosemite their home set small fires to prevent such cataclysmic events. Contained and manageable, their fires turned Yosemite Valley into a meadow that attracted deer for hunting and kept people safe.
For decades, the federal government took the opposite approach. Worried about having to divert men away from the war and into the forests to fight fires during World War II, the U.S. Forest Service and War Advertising Council created the Smokey Bear character. What followed were decades of fire suppression and teaching Americans that fires must be avoided at all costs. The result has been an unprecedented buildup of combustible fuels that has fed massive fires across the West in recent years.
In the late 1980s, the government realized the danger of this approach and began the practice of brush clearance and controlled burns in strategically located parts of the national forests and parks. But even though the practice has brought success where it has been used, we are still more oriented to fighting fires than to preventing them.