You don’t just throw resources at a wildfire, it’s like a battle -- you have to think what will be the most effective. Cal Fire usually depends on a mix of bulldozers, fire engines, inmate crews, and helicopters or airplanes, which disperse things like fire retardant, to stop wildfires. Using containment lines, or large areas where a bulldozer cuts away vegetation to the point where only dirt remains, is very common, he said. But this isn’t always an accessible option.