Of course, wildfires that threaten people’s lives must be extinguished—and no one is suggesting otherwise. One such wildfire near Redding, California, this past summer burned straight through residential neighborhoods, killing at least eight people and destroying more than 1,000 homes. The smoke from the flames spread for miles, blanketing nearby cities in thick black smoke. For weeks, residents complained of itchy eyes, trouble breathing, headaches, and other health problems.
But what about wildfires that rage far from where people live? Attempting to put out those fires may do more harm than good, says scientist Chad T. Hanson. The destruction left behind by wildfires promotes stronger forests, he says. Weaker trees and bushes are cleared out, making room for plant life that is healthier and more varied.
In Yellowstone National Park, for example, wildfires are an essential—and natural—part of the ecosystem. Scientists say blazes help renew the soil, leading to the growth of new trees and bushes. Without occasional fires, experts note, biodiversity would decline.
What’s more, many animals know how to survive wildfires by burrowing, flying, or running away from danger. Certain species even prefer burned forests for their habitat. Some beetles can detect forest fires from miles away, and rush toward them to lay their eggs in just-burned trees.
Similarly, black-backed woodpeckers hunt for food in dead timber. The loss of part of its habitat has taken a toll on that species in particular. These woodpeckers are now one of the rarest birds in California.