California's megafires are burning more intensely than before. Controlled burns can help snuff that risk

Every wildfire in California has at least some impact on the landscape, whether it burns a few acres or a few hundred thousand. But over the last several years, wildfires in the West have been growing larger and burning more intensely than ever before. Last year, there were six different "megafires" in California where at least 100,000 acres burned.